id stringlengths 7 11 | source stringclasses 1
value | category stringclasses 11
values | title stringlengths 15 214 | text stringlengths 70 30.5k | url stringlengths 57 160 | tags stringlengths 3 113 | created_at int64 1.22B 1.79B |
|---|---|---|---|---|---|---|---|
se_77796904 | stackoverflow | DATA_SCIENCE | How to fit a constant using chi squared with errors | How to fit a constant using chi squared with errors
I am trying to fit a constant using using Chi squared as the fitting statistic. The constant I am trying to fit is not a simple scaling constant but feeds into an equation which output values.
const -> fn -> values and errors
There are tonnes of posts on here about C... | https://stackoverflow.com/questions/77796904/how-to-fit-a-constant-using-chi-squared-with-errors | statistics, curve-fitting | 1,704,929,139 |
se_77793957 | stackoverflow | DATA_SCIENCE | Getting error while running flexsurvreg function | Getting error while running flexsurvreg function
Can anyone help me how to to define the below given custom distribution in flexsurvreg function.
custom_pdf=function(y,b0,b1,b2,b3,sigma,alpha){#pdf of proposed model
z=(y-b0-b1*t2-b2*t3-b3*t4)/sigma
ft=exp(z)
num=alpha*ft*((exp(-ft))^alpha)*((1-exp(-ft))^(alpha-1... | https://stackoverflow.com/questions/77793957/getting-error-while-running-flexsurvreg-function | r, statistics, regression, distribution, mle | 1,704,895,505 |
se_77783632 | stackoverflow | DATA_SCIENCE | How to combine multiple probability distributions created through convolution - aligning x-axis | How to combine multiple probability distributions created through convolution - aligning x-axis
I'm simulating event losses with Monte Carlo simulation but I'm having trouble aggregating multiple event losses, specifically with aligning losses to add probabilities.
I'm using Monte Carlo to estimate the probability dis... | https://stackoverflow.com/questions/77783632/how-to-combine-multiple-probability-distributions-created-through-convolution | statistics, probability, convolution, montecarlo | 1,704,756,161 |
se_77802393 | stackoverflow | DATA_SCIENCE | Errorbars with factors in R | Errorbars with factors in R
I have a graph with barplots and want to add errorbars, but really struggle with it.
sd_int <-R %>%
group_by(PSm, Day) %>%
summarise(sd = sd(int))
mean_int <-R %>%
group_by(PSm, Day) %>%
summarise(mean = mean(int))
print(sd_int)
print(mean_int)
combined_data <- merge(mean_int, sd_in... | https://stackoverflow.com/questions/77802393/errorbars-with-factors-in-r | r, statistics | 1,704,998,988 |
se_77800291 | stackoverflow | DATA_SCIENCE | How can I get sequences of actions from a Pandas dataframe | How can I get sequences of actions from a Pandas dataframe
I have a Pandas dataframe in Python in which is registered when Ramirez enters and leaves a building. I also have a list in which all events in the building are registrered, from turning on the lights to flushing a toilet or calling an elevator. I have ordered... | https://stackoverflow.com/questions/77800291/how-can-i-get-sequences-of-actions-from-a-pandas-dataframe | python, pandas, statistics, pattern-matching, combinations | 1,704,978,344 |
se_77786552 | stackoverflow | DATA_SCIENCE | Collision rate of `rand64()` function in Clickhouse | Collision rate of `rand64()` function in Clickhouse
I'm planning to use Int64() for primary key and rand64() for it's generation. I need uniqueness (no collisions) and I'm planning to have billions of rows. I cannot use UUID for other reasons.
What is the probability of it to generate collision? I know that UUID is pr... | https://stackoverflow.com/questions/77786552/collision-rate-of-rand64-function-in-clickhouse | statistics, clickhouse | 1,704,800,966 |
se_77786816 | stackoverflow | DATA_SCIENCE | Radar Vegation Index scaling issues [0, 1] for Sentinel-1 data | Radar Vegation Index scaling issues [0, 1] for Sentinel-1 data
I am trying to understand some data issues I am having with using Sentinel-1 VV and VH data to create RVI statistics.
I am familiar with the fact that you need true quad polarisation to calculate the RVI. The best approximate RVI equation for S1 has been d... | https://stackoverflow.com/questions/77786816/radar-vegation-index-scaling-issues-0-1-for-sentinel-1-data | python, image-processing, statistics, sentinel1 | 1,704,803,811 |
se_26739745 | stackoverflow | DATA_SCIENCE | Multiple boxplots in SAS | Multiple boxplots in SAS
I have this data set and I would like to make all boxplots of the 9 input variables to appear on the same plot, despite that they are in different scales. Could you please tell me if there is an easy way to accomplish this?
I am a novice SAS user so I would appreciate some advice. Thank you.... | https://stackoverflow.com/questions/26739745/multiple-boxplots-in-sas | statistics, sas | 1,415,117,308 |
se_77783243 | stackoverflow | DATA_SCIENCE | Intra class correlation coefficient equals 1 for both random effects | Intra class correlation coefficient equals 1 for both random effects
I am evaluating for clustering of two grouping variables that I may include as random effects in a glmm with other predictors. Both grouping variables are nested elements of the study design. The first is "Sample" (for context, each microbiological f... | https://stackoverflow.com/questions/77783243/intra-class-correlation-coefficient-equals-1-for-both-random-effects | statistics, lme4 | 1,704,749,310 |
se_77773742 | stackoverflow | DATA_SCIENCE | Statistical difference between two matrices | Statistical difference between two matrices
I have two matrices, for example;
x1 = [1,2,3];
y1 = [4,5,6];
m1 = [x1,y1];
x2 = [4,5,6];
y2 = [7,8,9];
m2 = [x2,y2];
How do I test if m1 and m2 are significantly different from one another? | https://stackoverflow.com/questions/77773742/statistical-difference-between-two-matrices | matlab, statistics | 1,704,642,412 |
se_77767517 | stackoverflow | DATA_SCIENCE | Combine rows and columns to create a 2x2 table for Fisher's exact test | Combine rows and columns to create a 2x2 table for Fisher's exact test
I need to perform a test of independence on the following crosstab ct using python:
Since there are some values less than 5, I cannot perform the chi-square test of independence. Instead, I need to perform Fisher's exact test.
Since Fisher's e... | https://stackoverflow.com/questions/77767517/combine-rows-and-columns-to-create-a-2x2-table-for-fishers-exact-test | python, scipy, statistics, data-analysis | 1,704,494,187 |
se_77762139 | stackoverflow | DATA_SCIENCE | How do I simulate Bayes theorem in R to get a sense of uncertainty? | How do I simulate Bayes theorem in R to get a sense of uncertainty?
Okay, so Bayes theorem is p(A|B) = p(A) * P(B|A) * 1/p(B).
I want to simulate p(A|B) using all the uncertainty surrounding p(A), p(B|A) and p(B).
rbeta seems like a good choice.
data: imagine I just spent 20 days in a new location and have a sense of ... | https://stackoverflow.com/questions/77762139/how-do-i-simulate-bayes-theorem-in-r-to-get-a-sense-of-uncertainty | r, statistics, simulation, bayesian, sampling | 1,704,420,351 |
se_77766687 | stackoverflow | DATA_SCIENCE | Linear regression for Physical problem predicting complex number (absolute and phase) | Linear regression for Physical problem predicting complex number (absolute and phase)
I am trying to do a linear regression which takes some physical measurements and then predicts various Physical values. One of these Physical values is a complex number, so I am trying to split it into two and predict the magnitude a... | https://stackoverflow.com/questions/77766687/linear-regression-for-physical-problem-predicting-complex-number-absolute-and-p | machine-learning, statistics, artificial-intelligence, non-linear-regression | 1,704,481,394 |
se_77763912 | stackoverflow | DATA_SCIENCE | Use VPA to evaluate tiny probabilities | Use VPA to evaluate tiny probabilities
For a statistics application, I need to evaluate tiny chi-square probabilities. But when this becomes smaller than matlab's double-precision limit realmin (around 1e-308), it returns 0.
x=50;
p=chi2cdf(x^2,4,'upper')
>> 0
All I need is to store the order of magnitude of the numb... | https://stackoverflow.com/questions/77763912/use-vpa-to-evaluate-tiny-probabilities | matlab, statistics, precision, probability, arbitrary-precision | 1,704,450,286 |
se_77757158 | stackoverflow | DATA_SCIENCE | Excel, how to have grouped TRIMMEAN | Excel, how to have grouped TRIMMEAN
Hi i have dynamic data updated from remote every day of that type
state
city
id
number
s1
c1
i1
45
s1
c1
i2
2
s1
c2
i3
12
s2
c1
i4
23
s2
c4
i5
45
i need a result set with this structure
state
city
avg
i try with pivot but TRIMMEAN() is not available as gr... | https://stackoverflow.com/questions/77757158/excel-how-to-have-grouped-trimmean | excel, excel-formula, statistics, mean | 1,704,360,824 |
se_39434402 | stackoverflow | DATA_SCIENCE | How to get confidence intervals from curve_fit | How to get confidence intervals from curve_fit
My question involves statistics and python and I am a beginner in both. I am running a simulation, and for each value for the independent variable (X) I produce 1000 values for the dependent variable (Y). What I have done is that I calculated the average of Y for each val... | https://stackoverflow.com/questions/39434402/how-to-get-confidence-intervals-from-curve-fit | python, python-3.x, scipy, statistics, curve-fitting | 1,473,583,931 |
se_65132970 | stackoverflow | DATA_SCIENCE | Statistical annotations in plotly bar graph | Statistical annotations in plotly bar graph
What is a good way to create statistical annotations in plotly bar graphs? And how can I move the p-value in the figure below to the middle, i.e. between the two bar charts?
Image of plotly graph with p-values
import plotly.graph_objects as go
import pandas as pd
df = pd.re... | https://stackoverflow.com/questions/65132970/statistical-annotations-in-plotly-bar-graph | python, pandas, statistics, plotly, p-value | 1,607,024,408 |
se_77695253 | stackoverflow | DATA_SCIENCE | Sampling two correlated random variables using the gamma distribution | Sampling two correlated random variables using the gamma distribution
I have two random variables that are distributed by the gamma distribution. These random variables are negatively correlated by a coefficient of -.1. I'm not sure how to incorporate the correlation correctly. By looking at many different examples, I... | https://stackoverflow.com/questions/77695253/sampling-two-correlated-random-variables-using-the-gamma-distribution | r, statistics, gamma-distribution | 1,703,120,860 |
se_4780826 | stackoverflow | DATA_SCIENCE | Mobile apps statistics API | Mobile apps statistics API
I need to collect stats for my mobile apps.
I like flurry.com but I want to use my server and generate custom reports for my users.
Do you know if exists opensource API like flurry library? | https://stackoverflow.com/questions/4780826/mobile-apps-statistics-api | android, ios, mobile, statistics | 1,295,864,098 |
se_66573076 | stackoverflow | DATA_SCIENCE | Three-Way Anova in R | Three-Way Anova in R
I am trying to do a three-way ANOVA in R Studio (the latest version) and I can't seem to figure out the code that will allow me to do this. I am trying to see if there is a significant difference between the three variables "Latitude May", "Latitude June", and "Latitude July". I have attached a sa... | https://stackoverflow.com/questions/66573076/three-way-anova-in-r | r, statistics, anova | 1,615,411,443 |
se_77736807 | stackoverflow | DATA_SCIENCE | Produced invalid scale when simulated Generalized Pareto Distribution to find mse rmse and bias | Produced invalid scale when simulated Generalized Pareto Distribution to find mse rmse and bias
I am working on Generalized Pareto Distribution in R and I want to calculate the bias, mse and rmse of the disitribtion. However when I'm using the mle function the following error occured.
Error in dgpd(x = samples, scale ... | https://stackoverflow.com/questions/77736807/produced-invalid-scale-when-simulated-generalized-pareto-distribution-to-find-ms | r, optimization, statistics | 1,703,956,951 |
se_44843134 | stackoverflow | DATA_SCIENCE | partial correlation coefficient in pandas dataframe | partial correlation coefficient in pandas dataframe
I have a data in pandas dataframe like:
df =
X1 X2 X3 Y
0 1 2 10 5.077
1 2 2 9 32.330
2 3 3 5 65.140
3 4 4 4 47.270
4 5 2 9 80.570
and I want to do multiple regression analysis. Here Y is dependent variables and x1, x2... | https://stackoverflow.com/questions/44843134/partial-correlation-coefficient-in-pandas-dataframe | pandas, statistics, correlation | 1,498,814,957 |
se_77703069 | stackoverflow | DATA_SCIENCE | Encountering an UseMethod("predict") error when trying to run 'predict; command in R | Encountering an UseMethod("predict") error when trying to run 'predict; command in R
I am trying to run a SIS(Sure Independence screening)-SCAD model on a high-dimensional dataset. My goal is to measure a confusion matrix and then calculate these following metrics - accuracy, sensitivity, specificity and... | https://stackoverflow.com/questions/77703069/encountering-an-usemethodpredict-error-when-trying-to-run-predict-command | r, statistics | 1,703,240,546 |
se_77711095 | stackoverflow | DATA_SCIENCE | Different pattern and colors two-way ANOVA barplot | Different pattern and colors two-way ANOVA barplot
I´m plotting two factors and two variables in the same graph. However, I want that the factor time not only appears each bar with a different color, but also with a different pattern (using ggpattern). Nonetheless, I only achieved adding the color. Here is the dataset... | https://stackoverflow.com/questions/77711095/different-pattern-and-colors-two-way-anova-barplot | r, ggplot2, statistics, anova, ggpattern | 1,703,432,371 |
se_77691386 | stackoverflow | DATA_SCIENCE | Calculation of the standard deviation using mean and the percentages | Calculation of the standard deviation using mean and the percentages
I want to calculate the standard deviation using the mean and percentage.
For example:
I a class 20% students have less the 30 marks, 40% students got from 30 t0 60 marks and 40% are above 60 marks. The average score (mean) of the class is 66 marks. ... | https://stackoverflow.com/questions/77691386/calculation-of-the-standard-deviation-using-mean-and-the-percentages | statistics | 1,703,073,435 |
se_77653188 | stackoverflow | DATA_SCIENCE | Gabor Data Analysis: Chapter 1 Stuck in a Code: How to Set Directory | Gabor Data Analysis: Chapter 1 Stuck in a Code: How to Set Directory
Dear Stackoverflow Community,
I am trying to self-teach myself R and data analysis using the textbook "Békés, Gábor. Data Analysis for Business, Economics, and Policy" (https://gabors-data-analysis.com/) and I am stuck in the below code using Hotel V... | https://stackoverflow.com/questions/77653188/gabor-data-analysis-chapter-1-stuck-in-a-code-how-to-set-directory | r, statistics, data-analysis, summary | 1,702,466,656 |
se_32329321 | stackoverflow | DATA_SCIENCE | How do I get just the first quartile from a column | How do I get just the first quartile from a column
I have a dataframes with a column called Means. I want to get just the first quartile from this column. I know I can use quartile (df) or summary (df) but this gives me all the quartiles. How do I get just the first? | https://stackoverflow.com/questions/32329321/how-do-i-get-just-the-first-quartile-from-a-column | r, statistics | 1,441,103,404 |
se_77682524 | stackoverflow | DATA_SCIENCE | Finding the Outlines of a Graph | Finding the Outlines of a Graph
I'm trying to find the equations of the outlines of a graph in python with matplotlib.pyplot (in terms of μ and σ). I already, numpy and scipy outlined the graph, but I can't find a way of getting the equations of both of the lines in terms of the mean and standard deviation.
import mat... | https://stackoverflow.com/questions/77682524/finding-the-outlines-of-a-graph | python, statistics | 1,702,949,840 |
se_70002536 | stackoverflow | DATA_SCIENCE | How to calculate group and outcome numbers using known values | How to calculate group and outcome numbers using known values
When trying to perform a meta-analysis using the metabin library, I need the values below:
event.e,
n.e,
event.c, and
n.c
However, I don't have these values, so was hoping to calculate them using known data: Odds Ratio + logOR, 95% CIs (Upper and Lower), ... | https://stackoverflow.com/questions/70002536/how-to-calculate-group-and-outcome-numbers-using-known-values | r, statistics, metafor | 1,637,144,203 |
se_77668187 | stackoverflow | DATA_SCIENCE | Adding pvalues in regression | Adding pvalues in regression
results <- data.frame(prov = rownames(reg1$coefficients), b = reg1$coefficients, se = 0)
results$se[!is.na(reg1$coefficients)] <- reg1$se
results
This shows the coefficients and the se... how can I make that this shows also the pvalues??
prov b se
ln_Y... | https://stackoverflow.com/questions/77668187/adding-pvalues-in-regression | r, statistics | 1,702,664,940 |
se_76320119 | stackoverflow | DATA_SCIENCE | Is there a way to estimate multinomial proportions with confidence intervals using R survey package? | Is there a way to estimate multinomial proportions with confidence intervals using R survey package?
I have a survey data, with categorical variables. I would like to compute the proportion for each responses in Q1, as well as generating the confidence interval or uncertainty around the estimate. Is that doable? The d... | https://stackoverflow.com/questions/76320119/is-there-a-way-to-estimate-multinomial-proportions-with-confidence-intervals-usi | r, statistics, multinomial, proportions | 1,684,902,781 |
se_77639403 | stackoverflow | DATA_SCIENCE | In Distributions.jl package for Julia, how to define MvNormal distributions with the Cholesky matrix? | In Distributions.jl package for Julia, how to define MvNormal distributions with the Cholesky matrix?
I am writing some code that transforms multi-variate distributions by operating mostly on the cholesky factor of the covariance matrix. Suppose I have
using Distributions
g1 = MvNormal([1,2], [2 1; 1 2])
The naive wa... | https://stackoverflow.com/questions/77639403/in-distributions-jl-package-for-julia-how-to-define-mvnormal-distributions-with | statistics, julia, normal-distribution, matrix-factorization | 1,702,295,879 |
se_25775468 | stackoverflow | DATA_SCIENCE | How to calculate a Goodness of Fit using Math.net? | How to calculate a Goodness of Fit using Math.net?
Say, I have a die that is 19 times as likely to produce a six as a one, because it has been tampered with.
When I throw this die 60 times the expected versus observed frequencies of the six possible outcomes are:
1: 10, 1
2: 10, 10
3: 10, 10
4: 10, 10
5: 10, 10
6: 10... | https://stackoverflow.com/questions/25775468/how-to-calculate-a-goodness-of-fit-using-math-net | .net, statistics, chi-squared, math.net | 1,410,384,905 |
se_77641462 | stackoverflow | DATA_SCIENCE | How to Calculate a 2D Empirical CDF via histogram2d | How to Calculate a 2D Empirical CDF via histogram2d
I am trying to obtain a matrix representation of an empirical 2 dimensional CDF given two data samples of the same size.
I have two sorted data samples of the same size: sorted_sample1 and sorted_sample2 . I want a matrix which represents their 2 dimensional empirica... | https://stackoverflow.com/questions/77641462/how-to-calculate-a-2d-empirical-cdf-via-histogram2d | python, numpy, statistics, probability, sample | 1,702,317,197 |
se_77653070 | stackoverflow | DATA_SCIENCE | Calculating row-wise student's t test between selected variables in a dataframe - R | Calculating row-wise student's t test between selected variables in a dataframe - R
I have a dataframe of individuals with different scores across different criteria, see example dataframe for 10 individuals each with 7 scores (A to G):
set.seed(123)
df <- data.frame(
A = rnorm(10, mean = 0, sd = 1),
B = rnorm... | https://stackoverflow.com/questions/77653070/calculating-row-wise-students-t-test-between-selected-variables-in-a-dataframe | r, dplyr, statistics, apply, purrr | 1,702,465,600 |
se_77642813 | stackoverflow | DATA_SCIENCE | Mahalanobis distance between two columns containing two variables | Mahalanobis distance between two columns containing two variables
Good evening, I'd like to calculate the Mahalanobis distance between each observation of the two vectors (O_Temp, O_Salin) and (D_Temp, D_Salin) in the attached image.
So, the aim is to calculate the Mahalanobis distance between the column vector (O_Tem... | https://stackoverflow.com/questions/77642813/mahalanobis-distance-between-two-columns-containing-two-variables | r, statistics, data-analysis | 1,702,335,634 |
se_6814171 | stackoverflow | DATA_SCIENCE | What is the mathematical way of calculating PERCENT_RANK() ,CUME_DIST() ,PERCENTILE_CONT() and PERCENTILE_DISC() | What is the mathematical way of calculating PERCENT_RANK() ,CUME_DIST() ,PERCENTILE_CONT() and PERCENTILE_DISC()
I am trying to figure out how these newly introduced function in SQL Server Denali CTP 3 is working but didnot understood properly.
There are ofcourse some articles on this but it has not been clearly men... | https://stackoverflow.com/questions/6814171/what-is-the-mathematical-way-of-calculating-percent-rank-cume-dist-percent | sql, sql-server, math, sql-server-2012, statistics | 1,311,586,627 |
se_77647979 | stackoverflow | DATA_SCIENCE | How can I generate a function to represent a collection of probabilities so that I can estimate between points | How can I generate a function to represent a collection of probabilities so that I can estimate between points
My particular issue is that I am trying to find a better way to forecast for my business.
I have a table of jobs and their likelihood. that looks like this:
job
% likely
potential hours
Job 1
.4
40
... | https://stackoverflow.com/questions/77647979/how-can-i-generate-a-function-to-represent-a-collection-of-probabilities-so-that | python, statistics, probability | 1,702,401,895 |
se_77645510 | stackoverflow | DATA_SCIENCE | Simple seaborn distribution plot not working | Simple seaborn distribution plot not working
I’m trying to plot the distribution of scores on reddit posts, but can’t figure it out.
My data frame is something like that
df = pd.DataFrame({"score": [12, 19, 25987, 887, 887, 1],
"author": ["xxx", "x", "xxx", "xx", "xxxx", "x"]})
With a lot more data ... | https://stackoverflow.com/questions/77645510/simple-seaborn-distribution-plot-not-working | python, plot, statistics, seaborn, distribution | 1,702,378,525 |
se_77642127 | stackoverflow | DATA_SCIENCE | Generating dataframe with conditional random variables | Generating dataframe with conditional random variables
I'm trying to create a dataframe with two variables. The first one is binary physical activity status (active/non-active), the second one is presence of cardiovascular disease (also binary variable - 1/0).
The problem is that the presence of disease must occur wit... | https://stackoverflow.com/questions/77642127/generating-dataframe-with-conditional-random-variables | r, variables, random, statistics, simulation | 1,702,324,888 |
se_77641558 | stackoverflow | DATA_SCIENCE | FIxed effects with plm, problem with NaNs | FIxed effects with plm, problem with NaNs
I am trying to run a time-fixed effects regression with plm using the wbstats library. I have attached an image of the dataset for reference. I am rather new to this.
Model:
AfricaTotal <- plm(IndustryGDP ~ CurrentImports + AgriProd + factor(date), data = AfricaVariables, inde... | https://stackoverflow.com/questions/77641558/fixed-effects-with-plm-problem-with-nans | r, statistics, plm | 1,702,318,315 |
se_77641464 | stackoverflow | DATA_SCIENCE | Generating a PDF from Monte carlo Simulation | Generating a PDF from Monte carlo Simulation
If I have an analytical pdf of a generated random variable like this
y= (x**(d-1)*e**(-x/g))/(math.gamma(d)*g**d)
where d and g are constants
How to generate this pdf using the Monte-Carlo simulation
I substitute with x in the analytical equation and the PDF is generated, ... | https://stackoverflow.com/questions/77641464/generating-a-pdf-from-monte-carlo-simulation | python, python-3.x, python-2.7, statistics, static-analysis | 1,702,317,244 |
se_77607482 | stackoverflow | DATA_SCIENCE | Group based trajectory modeling in R | Group based trajectory modeling in R
I have a dataset consisting of 3 variables one ID, on variable Y, and time variable t.
It is in long form with each subject having several rows of registrations with the ordinal variable Y (1-5) and time of registration with the first registration being 0 and the rest in months sin... | https://stackoverflow.com/questions/77607482/group-based-trajectory-modeling-in-r | r, statistics, longitudinal | 1,701,791,067 |
se_13560138 | stackoverflow | DATA_SCIENCE | Calculate statistics on arrays | Calculate statistics on arrays
I'm building a web app that needs to calculate statistics on a data set. I need to calculate percentiles, averages, modes, and other statistical functions on arrays.
Normally in Python, I would just use scipy, numpy, or nltk which has a huge library of stat array functions. Are there an... | https://stackoverflow.com/questions/13560138/calculate-statistics-on-arrays | ruby, statistics | 1,353,913,600 |
se_77634551 | stackoverflow | DATA_SCIENCE | Pandas groupby() mean questions | Pandas groupby() mean questions
so I have a CSV file that has a [] of districts printed as columns that contain that contain rows of numerical data; I am wanting to derive a mean for each column iterated.
import pandas as pd
data = pd.read_csv('ny_data.csv')
df = pd.DataFrame(data, columns=["Upper Manhattan", "Inwood... | https://stackoverflow.com/questions/77634551/pandas-groupby-mean-questions | python, pandas, csv, statistics, mean | 1,702,206,952 |
se_77637992 | stackoverflow | DATA_SCIENCE | How to estimate the similarity between different cubic curves using R | How to estimate the similarity between different cubic curves using R
enter image description hereAll three variables were able to fit a cubic functional relationship with the buffer distance, and in order to estimate the relationship between the changes of these three variables because these curves are relatively sim... | https://stackoverflow.com/questions/77637992/how-to-estimate-the-similarity-between-different-cubic-curves-using-r | r, statistics | 1,702,279,394 |
se_75804686 | stackoverflow | DATA_SCIENCE | R-Squared (Coefficient of determination) range beyond 0 and 1? | R-Squared (Coefficient of determination) range beyond 0 and 1?
I was under the impression that the R-squared value is bound between 0 and 1. However after reading some online literature/forums and also some personal experience, I now feel that the R-squared value (coefficient of determination) is:
a) bound between neg... | https://stackoverflow.com/questions/75804686/r-squared-coefficient-of-determination-range-beyond-0-and-1 | statistics, coefficient-of-determination | 1,679,420,578 |
se_24432101 | stackoverflow | DATA_SCIENCE | Correlation coefficients and p values for all pairs of rows of a matrix | Correlation coefficients and p values for all pairs of rows of a matrix
I have a matrix data with m rows and n columns. I used to compute the correlation coefficients between all pairs of rows using np.corrcoef:
import numpy as np
data = np.array([[0, 1, -1], [0, -1, 1]])
np.corrcoef(data)
Now I would also like to ... | https://stackoverflow.com/questions/24432101/correlation-coefficients-and-p-values-for-all-pairs-of-rows-of-a-matrix | python, numpy, statistics, scipy, correlation | 1,403,789,960 |
se_77626389 | stackoverflow | DATA_SCIENCE | Correct way to combine Normal distributions in Julia with Distributions.jl | Correct way to combine Normal distributions in Julia with Distributions.jl
I have two multivariate normal distributions like such:
using Distributions, LinearAlgebra
g1 = MvNormal([1,2], [2 1; 1 2])
A = [3 1; 1 3]
B = [[A [0;0]]; transpose([0,0,1])]
g2 = MvNormal([1,2,3], B)
I would like to combine them into a new di... | https://stackoverflow.com/questions/77626389/correct-way-to-combine-normal-distributions-in-julia-with-distributions-jl | statistics, julia, normal-distribution | 1,702,036,792 |
se_74202417 | stackoverflow | DATA_SCIENCE | Stratified sampling for semantic segmentation | Stratified sampling for semantic segmentation
I have a set of images and multi-label masks (an image usually has segments of more than one class) and I would like to split it into train and validation sets. The data is imbalanced, where two of the classes appear in about 1% of the images and the other 2 classes have a... | https://stackoverflow.com/questions/74202417/stratified-sampling-for-semantic-segmentation | statistics, sampling, multilabel-classification, semantic-segmentation, imbalanced-data | 1,666,755,266 |
se_77626398 | stackoverflow | DATA_SCIENCE | How to tell how close we are to a GC for java processes? | How to tell how close we are to a GC for java processes?
I'm currently implementing some revisions in my ongoing project and I'm curious about their potential impact on garbage collection metrics. Specifically, I'm interested in continuing a custom paradigm for the project, that is, avoiding any GC activity during a s... | https://stackoverflow.com/questions/77626398/how-to-tell-how-close-we-are-to-a-gc-for-java-processes | java, statistics, garbage-collection, heap-memory | 1,702,036,853 |
se_77623100 | stackoverflow | DATA_SCIENCE | Logic Error sampling distribution of proportions | Logic Error sampling distribution of proportions
The problem states the following: A sample of 200 pieces has been taken, 10 % of produced units are not working ¿What's the probability that i / 200 pieces don't work?
Where i is an integer that takes numbers from 1 to 100
I tried to solve this, using the following code... | https://stackoverflow.com/questions/77623100/logic-error-sampling-distribution-of-proportions | pandas, numpy, matplotlib, scipy, statistics | 1,701,983,612 |
se_77622477 | stackoverflow | DATA_SCIENCE | Efficiently calculating autocorrelations and cross-correlations from high-dimensional time-series with Python? | Efficiently calculating autocorrelations and cross-correlations from high-dimensional time-series with Python?
I have a coordinate array of shape X.shape = (100000, 1000) and a property array of shape P.shape = (100000, 1000). I wish to calculate the distance dependent autocorrelation function of property P which I ex... | https://stackoverflow.com/questions/77622477/efficiently-calculating-autocorrelations-and-cross-correlations-from-high-dimens | python, numpy, parallel-processing, statistics | 1,701,975,173 |
se_77616254 | stackoverflow | DATA_SCIENCE | Python + Excel - deriving a correlated mean from 2 data groups? | Python + Excel - deriving a correlated mean from 2 data groups?
What I'm doing - I have two columns in Excel: price and borough(British for district). I've generated the overall data set using python too, so I already have a list composed of the various boroughs. I want a breakdown of the mean price for each value ass... | https://stackoverflow.com/questions/77616254/python-excel-deriving-a-correlated-mean-from-2-data-groups | python, excel, dataframe, statistics | 1,701,896,168 |
se_76739633 | stackoverflow | DATA_SCIENCE | Rearrange the order of nodes in a sankey diagram using ggsankey | Rearrange the order of nodes in a sankey diagram using ggsankey
I did a sankey diagram in R using the ggsankey package and everything is fine, only detail is I want to rearrenge the order of the nodes in the second level (right now it is arranged SD, PR, DP, and CR from top to bottom and i want them to appear CR, PR, ... | https://stackoverflow.com/questions/76739633/rearrange-the-order-of-nodes-in-a-sankey-diagram-using-ggsankey | r, ggplot2, statistics, sankey-diagram | 1,689,956,219 |
se_77609246 | stackoverflow | DATA_SCIENCE | How to predict a single value with regression model? | How to predict a single value with regression model?
I need to find expected brain mass for some picked body mass value.
Y = df_grouped_pow[['Brain mass (g)']]
X = sm.add_constant(a * np.power(Y, b))
model_pow = sm.OLS(Y, X)
result = model_pow.fit();
print(result.summary())
(a and b are previously calculated values.... | https://stackoverflow.com/questions/77609246/how-to-predict-a-single-value-with-regression-model | python, statistics | 1,701,810,550 |
se_77518513 | stackoverflow | DATA_SCIENCE | How do I analyze data for multilevel pairwise comparisons? | How do I analyze data for multilevel pairwise comparisons?
I am trying to run a study using Pairwise comparisons.
Essentially, I have two groups of images: Group A (containing 107 different images) and Group B (containing 100 different images). Participants will view two images at a time (one from Group A and one from... | https://stackoverflow.com/questions/77518513/how-do-i-analyze-data-for-multilevel-pairwise-comparisons | statistics, comparison, group, pairwise | 1,700,509,715 |
se_44742122 | stackoverflow | DATA_SCIENCE | How does regularization parameter work in regularization? | How does regularization parameter work in regularization?
In machine learning cost function, if we want to minimize the influence of two parameters, let's say theta3 and theta4, it seems like we have to give a large value of regularization parameter just like the equation below.
I am not quite sure why the bigger r... | https://stackoverflow.com/questions/44742122/how-does-regularization-parameter-work-in-regularization | machine-learning, statistics | 1,498,350,401 |
se_60918062 | stackoverflow | DATA_SCIENCE | Testing for interactions using the aligned rank transformation test (non-parametric two-way ANOVA) | Testing for interactions using the aligned rank transformation test (non-parametric two-way ANOVA)
I am completing an aligned rank transformation as follows, using the ARTool package:
model = art(Proportioncorrect~Trialtype+Method+Trialtype:Method,data=Cummulativecounting)
I have two factors (independent variables), ... | https://stackoverflow.com/questions/60918062/testing-for-interactions-using-the-aligned-rank-transformation-test-non-paramet | r, statistics, anova, interaction, posthoc | 1,585,502,657 |
se_67923985 | stackoverflow | DATA_SCIENCE | StandardScaler.inverse_transform() return the same array as input :/ Is sklearn broken or am I? | StandardScaler.inverse_transform() return the same array as input :/ Is sklearn broken or am I?
Good evening,
I'm currently pursuing a PhD in chemistry and in this framework I'm trying to apply my few knowledge in python and stats to discriminate sample based on their IR spectrum.
After a few of weeks of data acquisit... | https://stackoverflow.com/questions/67923985/standardscaler-inverse-transform-return-the-same-array-as-input-is-sklearn | python, syntax, statistics, sklearn-pandas | 1,623,337,998 |
se_77574316 | stackoverflow | DATA_SCIENCE | How to use R function tableby() to get the strata printed as extra columns instead of extra rows, or another way to accomplish the same thing? | How to use R function tableby() to get the strata printed as extra columns instead of extra rows, or another way to accomplish the same thing?
I would like to use the R function tableby() to get the strata printed as extra columns instead of extra rows, or find another way to accomplish the same thing. I show an examp... | https://stackoverflow.com/questions/77574316/how-to-use-r-function-tableby-to-get-the-strata-printed-as-extra-columns-inste | r, statistics, r-markdown | 1,701,289,715 |
se_77580187 | stackoverflow | DATA_SCIENCE | Mixed effect model in python | Mixed effect model in python
Hi i have a certain task i want to solve:
i have this task:
For two months, participants played an app, in which they played 5 different
therapeutic games (TGs). At the beginning of each session, they also completed a
5-scale State-of-Mind questionnaire, rating the extent to which they fee... | https://stackoverflow.com/questions/77580187/mixed-effect-model-in-python | python, statistics, regression, statsmodels | 1,701,362,718 |
se_77587228 | stackoverflow | DATA_SCIENCE | weighted pearson correlation coefficent with two sample sizes | weighted pearson correlation coefficent with two sample sizes
I have a dataframe with var1 and var1 nvar1 and nvar2 I want to get the weighted square of the pearson correlation coefficent between var1 and var2 weighted by the same sizes (nvar1 and nvar2)
# Create a mock DataFrame
df <- data.frame(
var1 = rnorm(100),... | https://stackoverflow.com/questions/77587228/weighted-pearson-correlation-coefficent-with-two-sample-sizes | r, statistics, correlation | 1,701,453,799 |
se_77580376 | stackoverflow | DATA_SCIENCE | How do I easily plot data in R (line plot), that were adjusted for confounding variables? | How do I easily plot data in R (line plot), that were adjusted for confounding variables?
since I now understand how to line plot data with multiple timepoints in R using ggpubr package, I want to plot data that has been adjusted for some known confounding variables in the data set.
What I already tried is to calculat... | https://stackoverflow.com/questions/77580376/how-do-i-easily-plot-data-in-r-line-plot-that-were-adjusted-for-confounding-v | r, ggplot2, statistics, data-analysis, adjustment | 1,701,364,126 |
se_68886403 | stackoverflow | DATA_SCIENCE | How to find the similarity between two differently sized distributions? | How to find the similarity between two differently sized distributions?
I have two differently sized (different number of samples) waves that are currently stored as lists of numbers. Is there a mathematical formula to measure the similarity between them?
For example:
Wave 1 : 1016 samples
Wave 2 : 512 samples
``` w... | https://stackoverflow.com/questions/68886403/how-to-find-the-similarity-between-two-differently-sized-distributions | python, statistics, signal-processing, radio-transmission | 1,629,682,359 |
se_77570149 | stackoverflow | DATA_SCIENCE | Generation of random samples from a mixture of the independent and the comonotonic copula | Generation of random samples from a mixture of the independent and the comonotonic copula
Dear Stack Overflow community:
I am working in R, and I need to create random samples from a mixture of two trivariate copulas:
C(u1, u2, u3) = w* C_independence (u1, u2, u3) + (1 - w) * C_comonotonic(u1, u2, u3)
Let's assume tha... | https://stackoverflow.com/questions/77570149/generation-of-random-samples-from-a-mixture-of-the-independent-and-the-comonoton | r, statistics, simulation, copula | 1,701,252,083 |
se_76478554 | stackoverflow | DATA_SCIENCE | Weighted Wilcoxon Rank-Sum test in Python | Weighted Wilcoxon Rank-Sum test in Python
I have some ordinal data that I want to run a Wilcoxon Rank-Sum test between two groups (say male vs female).
However, for other categories (such as age) there is some unbalancing between the population proportions and the sample that I got, therefore I wanted to apply some we... | https://stackoverflow.com/questions/76478554/weighted-wilcoxon-rank-sum-test-in-python | python, statistics, hypothesis-test, scipy.stats | 1,686,793,493 |
se_77566350 | stackoverflow | DATA_SCIENCE | Datacenter Job Scheduling using Genetic Algorithm or Linear Programming | Datacenter Job Scheduling using Genetic Algorithm or Linear Programming
I'm looking for some advice for an optimization problem regarding scheduling jobs in a datacenter.
So I have a list of jobs and each job has a required time for finishing and a number of cores it has to run on, e.g. job 1 needs 10 seconds and has ... | https://stackoverflow.com/questions/77566350/datacenter-job-scheduling-using-genetic-algorithm-or-linear-programming | optimization, statistics, mathematical-optimization, linear-programming, genetic-algorithm | 1,701,196,479 |
se_76691446 | stackoverflow | DATA_SCIENCE | How to use statsmodels get_rdataset? | How to use statsmodels get_rdataset?
Python's statsmodels library has get_rdataset() method that can fetch various datasets. Where is the list of datasets that can be fetched? How do I use it to load datasets?
The documentation has no mention of which datasets are available. It merely says that dataname: The name of t... | https://stackoverflow.com/questions/76691446/how-to-use-statsmodels-get-rdataset | python, statistics, statsmodels | 1,689,374,013 |
se_77531415 | stackoverflow | DATA_SCIENCE | SAS basic analysis problems | SAS basic analysis problems
first time SAS user here.
I have a dataset (plant) imported to SAS where I changed two variables from numeric to categorical. I managed to fit my model like so:
proc glm data=plant_formatted;
class dose_factor greenhouse_factor;
model growth = dose_factor light_intensity greenhouse_... | https://stackoverflow.com/questions/77531415/sas-basic-analysis-problems | statistics, sas | 1,700,668,581 |
se_77558070 | stackoverflow | DATA_SCIENCE | Calculate correlation in R (as.factor, as.numric) | Calculate correlation in R (as.factor, as.numric)
I need to calculate a correlation between the variable 'self-confidence' (continuous) and the variable 'gender' to see if I need to include it as a possible covariate in my analysis. I have to calculate a Pearson correlation. I have used the following code for the vari... | https://stackoverflow.com/questions/77558070/calculate-correlation-in-r-as-factor-as-numric | r, statistics | 1,701,098,810 |
se_77556760 | stackoverflow | DATA_SCIENCE | C_qf function - base stats packages | C_qf function - base stats packages
I have been running a piece of code which uses the gamlss qEGB2() function. However, it has been producing the following warning message:
In qf(p, 2 * nu, 2 * tau) : full precision may not have been achieved in 'qbeta'
When stepping into the qf function (within the qEGB2 function),... | https://stackoverflow.com/questions/77556760/c-qf-function-base-stats-packages | r, statistics, distribution | 1,701,086,755 |
se_77554553 | stackoverflow | DATA_SCIENCE | Postgresql - Create multicolumn Index - statistics created or not | Postgresql - Create multicolumn Index - statistics created or not
In Mssql, when we create multi column index, it itself creates multicolumn stats on those columns.
In postgresql, are multicolumn stats created or not | https://stackoverflow.com/questions/77554553/postgresql-create-multicolumn-index-statistics-created-or-not | postgresql, statistics | 1,701,060,171 |
se_48215526 | stackoverflow | DATA_SCIENCE | Can Kruskal-Wallis test be used to test significance of multiple groups within multiple factors? | Can Kruskal-Wallis test be used to test significance of multiple groups within multiple factors?
I have tried to read what I can on Kruskal-Wallis and while I have found some useful information, I still seem to not find the answer to my question.
I am trying to use the Kruskal-Wallis test to determine the significance... | https://stackoverflow.com/questions/48215526/can-kruskal-wallis-test-be-used-to-test-significance-of-multiple-groups-within-m | r, statistics, multivariate-testing, hypothesis-test, kruskal-wallis | 1,515,703,607 |
se_77549397 | stackoverflow | DATA_SCIENCE | "Full rank" error when estimating OLS with statsmodel | "Full rank" error when estimating OLS with statsmodel
I have historical data for crop yield, annual temperature and annual precipitation for a given region. My goal is to estimate the following linear model:
In which y is the crop annual yield, t stands for time (year), tmp for temperature (annual average)... | https://stackoverflow.com/questions/77549397/full-rank-error-when-estimating-ols-with-statsmodel | python, statistics, regression, linear-regression, modeling | 1,700,942,024 |
se_72661486 | stackoverflow | DATA_SCIENCE | Getting a series of Normal Distributions from a Least Squares regression | Getting a series of Normal Distributions from a Least Squares regression
I am not particularly good at math. I would like to get some breadcrumbs about how to solve the following formula using python code.
Assume an [m,n] matrix M and a [1,n] vector y.
Solve for the least squares using scipy.linalg.lstsq(M, y).
The o... | https://stackoverflow.com/questions/72661486/getting-a-series-of-normal-distributions-from-a-least-squares-regression | python, scipy, statistics, regression, gaussian | 1,655,478,902 |
se_76909842 | stackoverflow | DATA_SCIENCE | Calculating the population inside and outside a buffer | Calculating the population inside and outside a buffer
I have to calculate the population inside 1000m cells. The total population inside the cell in the images below is 2306.
enter image description here
enter image description here
The green is the buffer from a point. The orange falls outside the buffer. The popula... | https://stackoverflow.com/questions/76909842/calculating-the-population-inside-and-outside-a-buffer | statistics, buffer, arcgis | 1,692,146,580 |
se_77545293 | stackoverflow | DATA_SCIENCE | Analyzing Impact of a Single Independent Time Series Variable on a Cluster of Dependent Variables in R | Analyzing Impact of a Single Independent Time Series Variable on a Cluster of Dependent Variables in R
Hello Stack Overflow Community,
I am an economic researcher seeking statistical advice for an analysis I am conducting in R. My dataset includes one independent time series variable, X, and a large cluster of depende... | https://stackoverflow.com/questions/77545293/analyzing-impact-of-a-single-independent-time-series-variable-on-a-cluster-of-de | r, statistics, time-series, correlation, causality | 1,700,853,883 |
se_77543887 | stackoverflow | DATA_SCIENCE | pandas cut function's output is not understandable | pandas cut function's output is not understandable
ı want create frequency table with pandas ı tried this code but ı dont understand output also ı want change class range
data:
Rank
1 18.42
2 20.93
3 31.50
4 23.99
5 5.65
...
96 11.40
97 5.14
98 15.30
99 12.99
100... | https://stackoverflow.com/questions/77543887/pandas-cut-functions-output-is-not-understandable | python, pandas, dataframe, statistics, frequency-distribution | 1,700,836,450 |
se_77539871 | stackoverflow | DATA_SCIENCE | How do I create a Python Lambda lambda function to do this? | How do I create a Python Lambda lambda function to do this?
I have a dataframe which has a mean and standard deviation and I want to create a lambda function, or some other method, to contain the 1% Value at Risk level. The function for a scalar for what I want to do is var01 = norm.ppf(.01,Return,Vol)
The dataframe ... | https://stackoverflow.com/questions/77539871/how-do-i-create-a-python-lambda-lambda-function-to-do-this | python, pandas, dataframe, statistics | 1,700,778,337 |
se_77531202 | stackoverflow | DATA_SCIENCE | Is there a way to calculate a multiple moving averages based on an ID and data frame in R? | Is there a way to calculate a multiple moving averages based on an ID and data frame in R?
I am analyzing data and would like to calculate many moving averages at once. I will past here an example of what I am trying to do.
Table 1: IDs and Day
IDDate <- data.frame(ID = c("A","B","C"),
Stage1 = c(12, 13, 10),
Stage2... | https://stackoverflow.com/questions/77531202/is-there-a-way-to-calculate-a-multiple-moving-averages-based-on-an-id-and-data-f | r, statistics, average, moving-average | 1,700,666,716 |
se_53103834 | stackoverflow | DATA_SCIENCE | How can I find the source code for scipy.stats.mvn? | How can I find the source code for scipy.stats.mvn?
I was using the function mvn.mvnun() in the scipy.stats module to calculate the CDF of a given multivariate normal distribution in my paper. The reviewer asked me how I estimated the CDF since the CDF has no closed-form. I guess a sampling method might be used. To fi... | https://stackoverflow.com/questions/53103834/how-can-i-find-the-source-code-for-scipy-stats-mvn | python, scipy, statistics, probability-theory | 1,541,084,279 |
se_77524551 | stackoverflow | DATA_SCIENCE | Age standarised mortality rate by age group and by year in r | Age standarised mortality rate by age group and by year in r
I need help calculating a separate Age standardised mortality rate (Directly Standardised Rate) for males/females and by agegroup1 for 2011 to 2017 with 95%CI. I need to show this in line graphs as shown below in the picture. Any help would be much appreciat... | https://stackoverflow.com/questions/77524551/age-standarised-mortality-rate-by-age-group-and-by-year-in-r | r, ggplot2, statistics | 1,700,585,192 |
se_77520494 | stackoverflow | DATA_SCIENCE | Iterate a stats function over a row of a dataframe in pandas | Iterate a stats function over a row of a dataframe in pandas
I have a dataframe that looks like the table below. I want to create a new row called Ploss is the Normal Distribution function using Return as the mean and the Vol row as the standard deviation.
Here is the function call I tried Ploss=NormalDist(df.loc['R... | https://stackoverflow.com/questions/77520494/iterate-a-stats-function-over-a-row-of-a-dataframe-in-pandas | pandas, statistics | 1,700,544,561 |
se_63165775 | stackoverflow | DATA_SCIENCE | How to calculate the confidence intervals for prediction in Regression? and also how to plot it in python | How to calculate the confidence intervals for prediction in Regression? and also how to plot it in python
Fig 7.1, An Introduction To Statistical Learning
I am currently studying a book named Introduction to Statistical Learning with applications in R, and also converting the solutions to python language.
I am not ab... | https://stackoverflow.com/questions/63165775/how-to-calculate-the-confidence-intervals-for-prediction-in-regression-and-also | matplotlib, machine-learning, statistics, linear-regression, confidence-interval | 1,596,079,827 |
se_13040246 | stackoverflow | DATA_SCIENCE | Select random row from a PostgreSQL table with weighted row probabilities | Select random row from a PostgreSQL table with weighted row probabilities
Example input:
SELECT * FROM test;
id | percent
----+----------
1 | 50
2 | 35
3 | 15
(3 rows)
How would you write such query, that on average 50% of time i could get the row with id=1, 35% of time row with id=2, and 15% of t... | https://stackoverflow.com/questions/13040246/select-random-row-from-a-postgresql-table-with-weighted-row-probabilities | sql, postgresql, statistics, probability | 1,351,030,947 |
se_77519208 | stackoverflow | DATA_SCIENCE | R function call in error using mixR package | R function call in error using mixR package
I have a dataframe and I want to fit a mixR model for each column and print the plot. The code without using function without any problem, but when it was called in a function, an error happened. I checked them multiple times, but not able to find any abnormality. Any hint? ... | https://stackoverflow.com/questions/77519208/r-function-call-in-error-using-mixr-package | r, function, error-handling, statistics, function-call | 1,700,518,476 |
se_77519158 | stackoverflow | DATA_SCIENCE | Are there any distributions such that parameters have multimodal posteriors in Bayesian MCMC? | Are there any distributions such that parameters have multimodal posteriors in Bayesian MCMC?
I want to test a new idea I have for Bayesian MCMC, but it'd only be useful with multimodal posteriors. Are there any examples of such distributions?
For instance, with a gaussian mixture model, of course the distribution its... | https://stackoverflow.com/questions/77519158/are-there-any-distributions-such-that-parameters-have-multimodal-posteriors-in-b | statistics, bayesian, mcmc | 1,700,517,596 |
se_73897820 | stackoverflow | DATA_SCIENCE | get the median in sql | get the median in sql
i have a question, i was solving a problem of hackerank sql, the problem is the following:
A median is defined as a number separating the higher half of a data set from the lower half. Query the median of the Northern Latitudes (LAT_N) from STATION and round your answer to 4 decimal places.
the... | https://stackoverflow.com/questions/73897820/get-the-median-in-sql | mysql, sql, statistics, median | 1,664,464,096 |
se_77333679 | stackoverflow | DATA_SCIENCE | Getting a different kurtosis from numpy array method than from Summary | Getting a different kurtosis from numpy array method than from Summary
I have to extract information from the OLS statsmodel summary. While doing it, the Kurtosis results from the summary is different than the array method kurtosis().
Here is the code:
from sklearn.datasets import load_diabetes
import pandas as pd
imp... | https://stackoverflow.com/questions/77333679/getting-a-different-kurtosis-from-numpy-array-method-than-from-summary | numpy, scipy, statistics, linear-regression, statsmodels | 1,697,834,563 |
se_77513063 | stackoverflow | DATA_SCIENCE | Implementing covariance by hand | Implementing covariance by hand
I made a curious observation today - I implemented the covariance of two vectors 3 different ways, and got 2 different answers. In R, methods 1 and 2 are the same. Method 3 ought to be mathematically the same, but somehow it returns a different number. What is the bug here?
# Make some ... | https://stackoverflow.com/questions/77513063/implementing-covariance-by-hand | r, statistics, covariance | 1,700,441,705 |
se_21030391 | stackoverflow | DATA_SCIENCE | How to normalize a numpy array to a unit vector | How to normalize a numpy array to a unit vector
I would like to convert a NumPy array to a unit vector. More specifically, I am looking for an equivalent version of this normalisation function:
def normalize(v):
norm = np.linalg.norm(v)
if norm == 0:
return v
return v / norm
This function handles ... | https://stackoverflow.com/questions/21030391/how-to-normalize-a-numpy-array-to-a-unit-vector | python, numpy, scikit-learn, statistics, normalization | 1,389,299,103 |
se_77506368 | stackoverflow | DATA_SCIENCE | Interpreting y axis in density plot | Interpreting y axis in density plot
200 people were tested, 20 of those were infected. I want to get a posterior distribution for the uncertainty associated with the probability that a person is infected.
I do this like this:
n<-200
s<-20
p<-seq(0,0.3,0.001)
dp<-dbeta(p, s+1, n-s+1)
But then when I plot it, I don't ... | https://stackoverflow.com/questions/77506368/interpreting-y-axis-in-density-plot | r, statistics, probability-density, density-plot, beta-distribution | 1,700,300,577 |
se_77508049 | stackoverflow | DATA_SCIENCE | How to select 0.000 but not 0 in R? | How to select 0.000 but not 0 in R?
I have a vector of p-values, some of them are 0.000, and some of them are 0. How do I select 0.000, but not 0 because exact 0 doesn't make sense to me. I tried the code below, but it regards 0.000 and 0 as the same value. Any hint or respons will be appreciated. Thanks.
p = c(0,0,0.... | https://stackoverflow.com/questions/77508049/how-to-select-0-000-but-not-0-in-r | r, select, statistics, p-value | 1,700,329,403 |
se_77500548 | stackoverflow | DATA_SCIENCE | Simple percentage computation inside a table direct in Microsort Word | Simple percentage computation inside a table direct in Microsort Word
For one of my customers I need to constantly update a word document with statistics.
The statistics are very simple and are basically just a bunch of several tables with frequency counts and the corresponding percentages.
As it is very error prone a... | https://stackoverflow.com/questions/77500548/simple-percentage-computation-inside-a-table-direct-in-microsort-word | ms-word, statistics | 1,700,213,271 |
se_77107822 | stackoverflow | DATA_SCIENCE | How to do a Yule-Walker analysis in Julia | How to do a Yule-Walker analysis in Julia
Is there a method in Julia to perform a Yule-Walker analysis similar to the equivalent method in Python statsmodels.regression.linear_model.yule_walker ? | https://stackoverflow.com/questions/77107822/how-to-do-a-yule-walker-analysis-in-julia | statistics, time-series, julia | 1,694,719,079 |
se_69942339 | stackoverflow | DATA_SCIENCE | Understanding the output of my Ramsey RESET test | Understanding the output of my Ramsey RESET test
I am new to R, and doing a replication study where I need to check if their regression holds for the classical assumption for OLS. For the specification assumption, I am doing the Ramsey RESET test, here is my code:
simple_model <- lm(deploy ~ loggdppc + natoyears + mil... | https://stackoverflow.com/questions/69942339/understanding-the-output-of-my-ramsey-reset-test | r, statistics, linear-regression | 1,636,717,056 |
se_77505199 | stackoverflow | DATA_SCIENCE | Convert a list with a sum of 1 and keep the relations between the values | Convert a list with a sum of 1 and keep the relations between the values
Assume there is a list[int] like this:
[0, 2, 3, 3, 0, 9]
I want to convert it to list[float] with a sum of 1 and keep the relations between the values:
[a, b, c, d, e, f]
# a = e = 0
# c = d
# f = 4.5b = 3c = 3d
# a + b + c + d + e + f = 1
[0... | https://stackoverflow.com/questions/77505199/convert-a-list-with-a-sum-of-1-and-keep-the-relations-between-the-values | python, math, statistics, probability | 1,700,266,196 |
se_77488028 | stackoverflow | DATA_SCIENCE | DAX statistics calculation | DAX statistics calculation
The problem is solved!
Sam Nseir has found a solution!
[I am currently analyzing a survey (approx.60.0000 respondents in 30 European countries) on the topic of xenophobia.
More precisely: how many women and men in each country (in % of the sample) are xenophobic.
Ive checked a bit of this d... | https://stackoverflow.com/questions/77488028/dax-statistics-calculation | statistics, dax | 1,700,054,356 |
se_2374640 | stackoverflow | DATA_SCIENCE | How do I calculate percentiles with python/numpy? | How do I calculate percentiles with python/numpy?
Is there a convenient way to calculate percentiles for a sequence or single-dimensional numpy array?
I am looking for something similar to Excel's percentile function. | https://stackoverflow.com/questions/2374640/how-do-i-calculate-percentiles-with-python-numpy | python, numpy, statistics, quantile, percentile | 1,267,647,673 |
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