id stringlengths 16 145 | text stringlengths 1 179k | title stringclasses 1
value |
|---|---|---|
R_base_all/simulation.html8_12_0.txt | Note that if I call ` rnorm() ` again I will of course get a different set of
5 random numbers.
> rnorm(5)
[1] -0.8204684 0.4874291 0.7383247 0.5757814 -0.3053884 | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_92_0.txt | 55.2k 16 16 gold badges 128 128 silver badges 154 154 bronze badges
2 | |
R_base_all/1370168_4_0.txt | 1. First I subset data for one day
2. Sum all item quantity in that day
3. Divide each item quantity with the sum(from previous step), lets call the result weight
4. multiply each items quantity with the corresponding weight and sum the results for each item.
5. Divide result from step 4 with the sum of a... | |
R_base_all/1370168_11_0.txt | This topic was automatically closed 7 days after the last reply. New replies
are no longer allowed.
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refer back with a link.
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R_base_all/R_base_all_354_0.txt | [ RDocumentation ](/)
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# attr: Object Attributes
## Description
Get or set specific attributes of an object.
## U... | |
R_base_all/R_base_all_380_3.txt | /link/readChar?package=base&version=3.6.2) ` and ` [ readBin
](/link/readBin?package=base&version=3.6.2) ` to read fixed or variable length
character strings or binary representations of numbers a few at a time from a
connection.
## Examples
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R_base_all/weighted-average-excel4_105_0.txt | @Krunal
I have assumed that the 1200 units on 1 Jan applies from 1 Jan until the next
period 8 Mar
If it is the other way around where data applies retrospectively, then your
right except that we would leave out the Jan 1 result, see below
eg:
` 1-Jan-11 1,200 -
8-Mar-11 1,000 66
17-Mar-11 1,500 9
5-Jun-1... | |
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# Ops.Date: Operators on the Date Class
## Description
Operators for the ` " [ Date ](/link/... | |
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# lazyLoad: Lazy Load a Database of R Objects
## Description
Internal functions to lazy load... | |
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# rowsum: Give Column Sums of a Matrix or Data Frame, Based on a Grouping
Variable
## Descrip... | |
R_base_all/weighted-average-excel4_168_0.txt | It is unclear what is in what column
It appears that you have 4 column
The formula is :
=Sumproduct( weight range, data range) / sum(weight range) | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_83_0.txt |
before$type_1 <- gsub("_and_.+$", "", before$type)
before$type_2 <- gsub("^.+_and_", "", before$type)
before$type <- NULL
Share | |
R_base_all/weighted-average-excel4_182_0.txt | May 1, 2012 at 1:32 pm
@Manu
Assuming your data is in A1:B16 the weighted average is: `
=SUMPRODUCT(A2:A16,B2:B16)/SUM(A2:A16) ` | |
R_base_all/weighted-average-excel4_21_0.txt | ` =SUMPRODUCT(B26:B30, C26:C30) / SUM(C26:C30) `
Notice that this formula is same as the formula for weighted average with
weights not adding up to 100 percent. | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_159_0.txt | edited Aug 28, 2023 at 13:20
answered Jul 21, 2023 at 11:09 | |
R_base_all/getting-started-simulating-data8_22_0.txt | ### Change parameters in rnorm()
For getting a quick set of numbers it’s easy to use the default parameter
values in ` rnorm() ` but we can certainly change the values to something
else. For example, when I’m exploring long-run behavior of variance estimated
from linear models I will want to vary the standard deviati... | |
R_base_all/1370168_0_0.txt | Posit Community
# How to calculate weighted average | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_53_0.txt | * 4
Is there a way to limit number of splits with separate? Let's say I want to
split on '_' only once (or do it with ` str_split_fixed ` and adding columns
to existing dataframe)? | |
R_base_all/index.html6_43_0.txt |
mns <- c(159.54, 245.26, 25.52);
We are now ready to use the ` mvrnorm ` function in R to simulate some number
` n ` of sampled organisms with these three measurements. We use the ` mvrnorm
` arguments ` mu ` and ` Sigma ` to specify the vector of means and covariance
matrix, respectively. | |
R_base_all/index.html6_50_0.txt | Let us add one more data column. Suppose that we can also sample the number of
offspring each organism has, and that the mean number of offspring that an
organism has equals one tenth of the organism’s mass. To do this, we can use `
rpois ` , and take advantage of the fact that the argument ` lambda ` can be a
vector r... | |
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# unlink: Delete Files and Directories
## Description
` unlink ` deletes the file(s) or dire... | |
R_base_all/R_base_all_154_1.txt | icular, ` as.numeric ` applied to a factor is
meaningless, and may happen by implicit coercion. To transform a factor ` f `
to approximately its original numeric values, ` as.numeric(levels(f))[f] ` is
recommended and slightly more efficient than ` as.numeric(as.character(f)) ` .
The levels of a factor are by default ... | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_209_0.txt | Question feed
To subscribe to this RSS feed, copy and paste this URL into your RSS reader. | |
R_base_all/weighted-average-excel4_118_0.txt | 24. James Calvo says:
September 21, 2011 at 5:16 am | |
R_base_all/index.html6_29_0.txt | Note that the numbers {4, 6, 8, 9} are now repeated in the set of randomly
sampled values above. We can also specify the probability of sampling each
element, with the condition that these probabilities need to sum to 1. Below
shows an example in which the numbers 1-5 are sampled with a probability of
0.05, while the n... | |
R_base_all/weighted-average-excel4_12_0.txt | You are a happy boss to find that your employees are making $330k per year.
Except, you are wrong. You have not considered the number of employees in
each department before calculating the average. So, the correct average would
be $76k as shown above. | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_205_0.txt | How to separate a string column into multiple columns?
3 | |
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# as.data.frame: Coerce to a Data Frame
## Description
Functions to check if an object is a ... | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_154_0.txt | ashaw ashaw
198 5 5 bronze badges | |
R_base_all/weighted-average-excel4_57_0.txt | June 15, 2010 at 11:00 am
[...] link Leave a Reply [...] | |
R_base_all/weighted-average-excel4_19_0.txt |
=SUMPRODUCT(<your values>, <your weights>) / SUM(<your weights>)
## Weighted Average when you have counts instead of weights: | |
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# getCallingDLL: Compute DLL for Native Interface Call
## Description
This is an internal fu... | |
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# source: Read R Code from a File, a Connection or Expressions
## Description
` source ` cau... | |
R_base_all/getting-started-simulating-data8_42_0.txt | ## Discrete counts with rpois()
Let’s look at one last function for generating random numbers, this time for
generating discrete integers (including 0) from a Poisson distribution with `
rpois() ` . | |
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# kappa: Compute or Estimate the Condition Number of a Matrix
## Description
The condition n... | |
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# grouping: Grouping Permutation
## Description
` grouping ` returns a permutation which rea... | |
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# bitwise: Bitwise Logical Operations
## Description
Logical operations on integer vectors w... | |
R_base_all/weighted-average-excel4_139_0.txt | @Ann
=Sum(range of the last 4 qtrs)/4
Reply | |
R_base_all/weighted-average-excel4_91_0.txt | August 16, 2011 at 12:41 pm
That works nicely. Thank you! | |
R_base_all/weighted-average-excel4_357_0.txt | One email per week with Excel and Power BI goodness. Join 100,000+ others and
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# zpackages: Listing of Packages
## Description
` .packages ` returns information about pack... | |
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# raw: Raw Vectors
## Description
Creates or tests for objects of type ` "raw" ` .
## Usag... | |
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# tapply: Apply a Function Over a Ragged Array
## Description
Apply a function to each cell ... | |
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# pcre_config: Report Configuration Options for PCRE
## Description
Report some of the confi... | |
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# numeric: Numeric Vectors
## Description
Creates or coerces objects of type ` "numeric" ` .... | |
R_base_all/index.html6_3_0.txt | * * *
The ability to simulate data is a useful tool for better understanding
statistical analyses and planning experimental designs. These notes illustrate
how to simulate data using a variety of different functions in the R
programming language, then discuss how data simulation can be used in
research. These notes bo... | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_28_0.txt | 92k 18 18 gold badges 141 141 silver badges 199 199 bronze badges
asked Dec 3, 2010 at 22:29 | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_215_0.txt | Site design / logo © 2024 Stack Exchange Inc; user contributions licensed
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R_base_all/pandas.Series.str.split.html8_4_2.txt | das.Series.str.partition
* pandas.Series.str.removeprefix
* pandas.Series.str.removesuffix
* pandas.Series.str.repeat
* pandas.Series.str.replace
* pandas.Series.str.rfind
* pandas.Series.str.rindex
* pandas.Series.str.rjust
* pandas.Series.str.rpartition
* pandas.Series.str... | |
R_base_all/80542_1_0.txt | tidyverse
dplyr , stringr | |
R_base_all/1188876_11_0.txt | This solution relies on a regular expression in the line `
stringr::str_remove(x, "[0-9]*,") `
Here's what it's saying.
` stringr::str_remove ` : I'm using the ` str_remove ` function in the `
stringr ` package to remove a specific pattern from all strings where it
occurs. For any strings where the pattern doesn't o... | |
R_base_all/ts_moving_averages6_19_0.txt | To make the moving average symmetric (and therefore more accurate), we then
take a 2-MA of the 4-MA to create a 2 x 4-MA . For the 2-MA step, we average
the current and previous moving averages, thus resulting in an overall
estimate of:
This two-step process can be performed easily with the ` ma ` function by
settin... | |
R_base_all/weighted-average-excel4_32_0.txt | LinkedIn
Share this tip with your colleagues | |
R_base_all/R_base_all_358_1.txt | "variable %s contains missing values\n",
"variables %s contain missing values\n"),
paste(sQuote(miss), collapse = ", ")))
# }
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# logical: Logical Vectors
## Description
Create or test for objects of type ` "logical" ` ,... | |
R_base_all/R_base_all_82_1.txt | rse data can be retrieved using ` [ getParseData
](/link/getParseData?package=base&version=3.6.2) ` applied to the ` srcfile `
object. Because parsing was incomplete, it will typically include references
to ` "parent" ` entries that are not present.
## Details
` parse(....) ` :
If ` text ` has length greater ... | |
R_base_all/weighted-average-excel4_18_0.txt | The idea is to divide the total of weights with the SUMPRODUCT result so that
we can adjust Weighted Average as the weights don’t add up to 100 percent.
### WAvg Formula Pattern when weights don’t add up to 100 percent | |
R_base_all/simulation.html8_25_0.txt |
> log.mu <- 0.5 + 0.3 * x
> y <- rpois(100, exp(log.mu))
> summary(y)
Min. 1st Qu. Median Mean 3rd Qu. Max.
0.00 1.00 1.00 1.55 2.00 6.00
> plot(x, y)
You can build arbitrarily complex models like this by simulating more
predictors or making transformatio... | |
R_base_all/index.html6_35_0.txt |
N <- 10000;
rho <- 0.3;
x1 <- rnorm(n = N, mean = 0, sd = 1);
x2 <- (rho * x1) + sqrt(1 - rho*rho) * rnorm(n = N, mean = 0, sd = 1);
Mathematically, these variables are generated by first simulating the sample
\\(x_{1}\\) ( ` x1 ` above) from a standard normal distribution. Then,
\\(x_{2... | |
R_base_all/weighted-average-excel4_78_0.txt | Reply
10. Hui... says: | |
R_base_all/R_base_all_199_1.txt | ines ` :
controls the number of lines used when deparsing in ` [ traceback
](/link/traceback?package=base&version=3.6.2) ` , ` [ browser
](/link/browser?package=base&version=3.6.2) ` , and upon entry to a function
whose debugging flag is set. Initially unset, and only used if set to a
positive integer.
` digits... | |
R_base_all/index.html6_39_0.txt | Suppose we want to simulate a data set of three measurements from a species of
organisms. Measurement 1 ( \\(M_1\\) ) has a mean of \\(\mu_{M_{1}} =\\)
159.54 and variance of \\(Var(M_1) =\\) 12.68, measurement 2 ( \\(M_2\\) )
has a mean of \\(\mu_{M_{1}} =\\) 245.26 and variance of \\(Var(M_2) =\\)
30.39, an... | |
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# nargs: The Number of Arguments to a Function
## Description
When used inside a function bo... | |
R_base_all/R_base_all_220_1.txt | "s
A <- 10.5
call("round", A) # round(10.5)
call("round", quote(A)) # round(A)
f <- "round"
call(f, quote(A)) # round(A)
## if we want to supply a function we need to use as.call or similar
f <- round
# }
# NOT RUN {
call(f, quote(A)) # error: first arg must be... | |
R_base_all/getting-started-simulating-data8_58_0.txt | There are three arguments that help us repeat the values in the vector in `
rep() ` with different patterns: ` each ` , ` times ` , and ` length.out ` .
These can be used individually or in combination.
With ` each ` we repeat each unique character in the vector the defined number
of times. The replication is done “el... | |
R_base_all/1370168_7_0.txt | FJCC May 12, 2022, 8:43pm 2
I'm not sure I understood all the steps correctly. This gets through step 4.
For step 5, isn't the sum of all the weights equal to one for each day? | |
R_base_all/weighted-average-excel4_196_0.txt | 1
2
3
4
5
3
1
0
10
7 | |
R_base_all/1358206-date-manipulation-volume-weighted-average1_29_0.txt | * Pierre Louveau
* Join Date: Sep 2016
* Posts: 2
* * * * | |
R_base_all/pandas.Series.str.split.html8_25_0.txt |
Split strings around given separator/delimiter. | |
R_base_all/R_base_all_198_2.txt | ssible in only one of the modes: for
example ` [ pushBack ](/link/pushBack?package=base&version=3.6.2) ` is text-
oriented and is only allowed on connections open for reading in text mode, and
binary operations such as ` [ readBin
](/link/readBin?package=base&version=3.6.2) ` , ` [ load
](/link/load?package=base&versio... | |
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# regmatches: Extract or Replace Matched Substrings
## Description
Extract or replace matche... | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_133_0.txt | This is the most coherent 'built for purpose'.
– Chris | |
R_base_all/R_base_all_169_1.txt | h = 2) # not the same.
rep(1:4, c(2,2,2,2)) # same as second.
rep(1:4, c(2,1,2,1))
rep(1:4, each = 2, len = 4) # first 4 only.
rep(1:4, each = 2, len = 10) # 8 integers plus two recycled 1's.
rep(1:4, each = 2, times = 3) # length 24, 3 complete replications
rep(1, 40*(1-.8)... | |
R_base_all/R_base_all_198_1.txt | ger status, invisibly. The status
is from when the connection was last closed and is available only for some
types of connections (e.g., pipes, files and fifos): typically zero values
indicate success. Negative values will result in a warning; if writing, these
may indicate write failures and should not be ignored.
` ... | |
R_base_all/split-data-frame-string-column-into-multiple-columns0_78_0.txt | Nov 10, 2016 at 18:23
* 2 | |
R_base_all/R_base_all_113_1.txt | ons(op)
# }
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R_base_all/split-data-frame-string-column-into-multiple-columns0_185_0.txt | #### Linked
135 | |
R_base_all/weighted-average-excel4_86_0.txt | August 15, 2011 at 12:05 pm
What if my weights are decline equally. Example Data to be measured with WMA
A10:A20, weights 10,9,8,7, etc, starting with A20*10, A19*9, A18*8 etc. | |
R_base_all/R_base_all_237_1.txt | ` and ` [ readRDS
](/link/readRDS?package=base&version=3.6.2) ` .
## Examples
[ Run this code
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# NOT... | |
R_base_all/pandas.Series.str.split.html8_39_0.txt |
>>> s.str.split(n=2)
0 [this, is, a regular sentence]
1 [https://docs.python.org/3/tutorial/index.html]
2 NaN
dtype: object
>>> s.str.rsplit(n=2)
0 [this is a, regular, sentence... | |
R_base_all/R_base_all_190_1.txt | cores' by group (standardize to mean zero, variance one)
z <- unsplit(lapply(split(x, g), scale), g)
# or
zz <- x
split(zz, g) <- lapply(split(x, g), scale)
# and check that the within-group std dev is indeed one
tapply(z, g, sd)
tapply(zz, g, sd)
### data frame ... | |
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# deparseOpts: Options for Expression Deparsing
## Description
Process the deparsing options... | |
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# Bessel: Bessel Functions
## Description
Bessel Functions of integer and fractional order, ... | |
R_base_all/weighted-average-excel4_248_0.txt | August 17, 2013 at 6:08 am
@Not Your Average Analyst | |
R_base_all/index.html6_36_0.txt | \\(x_{2} = \rho x_{1} + \sqrt{1 - \rho^{2}}x_{rand},\\)
Where \\(x_{rand}\\) is a sample from a normal distribution with the same
variance as \\(x_{1}\\) . A simple call to the R function ` cor ` will
confirm that the correlation does indeed equal ` rho ` (with some sampling
error). | |
R_base_all/R_base_all_53_1.txt | 6.2%2Ftopics%2FgrepRaw&utm_source=r-docs&utm_medium=docs&utm_term=grepRaw&utm_content=run_example_in_workspace)
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# tempfile: Create Names for Temporary Files
## Description
` tempfile ` returns a vector of... | |
R_base_all/weighted-average-excel4_77_0.txt | June 15, 2010 at 4:30 pm
If I'm the CEO, I'd want to see how much money total is spent on payroll for
each department. In which case, I'd just total payroll spending and divide by
total # employees. | |
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# ns-dblcolon: Double Colon and Triple Colon Operators
## Description
Accessing exported and... | |
R_base_all/80542_4_0.txt | Andrew May 4, 2018, 12:46pm 2
I actually managed to speed things up as I have a lot of duplicates in the
column I'm trying to split. Doing | |
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# tracemem: Trace Copying of Objects
## Description
This function marks an object so that a ... | |
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# chkDots: Warn About Extraneous Arguments in the "..." of Its Caller
## Description
Warn ab... | |
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# pmatch: Partial String Matching
## Description
` pmatch ` seeks matches for the elements o... | |
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R_base_all/split-data-frame-string-column-into-multiple-columns0_91_0.txt | answered Dec 4, 2010 at 2:09
Ramnath Ramnath | |
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# Hyperbolic: Hyperbolic Functions
## Description
These functions give the obvious hyperboli... | |
R_base_all/weighted-average-excel4_360_0.txt | #### About
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R_base_all/R_base_all_245_1.txt | ty
environment ` emptyenv() ` , into which nothing may be assigned.
The replacement function ` parent.env<- ` is extremely dangerous as it can be
used to destructively change environments in ways that violate assumptions
made by the internal C code. It may be removed in the near future.
The replacement form of ` envi... | |
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# strtrim: Trim Character Strings to Specified Display Widths
## Description
Trim character ... | |
R_base_all/Simulation.html9_15_0.txt | Equivalently, if we want to see all of the 0s and 1s, we can request 100
observations, each of size 1, with success probability of 0.7. Give it a try,
assigning the result to a new variable called flips2.
flips2 <- rbinom(100, size = 1, prob = 0.7) |
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