{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Iris"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Introduction:\n",
"\n",
"This exercise may seem a little bit strange, but keep doing it.\n",
"\n",
"### Step 1. Import the necessary libraries"
]
},
{
"cell_type": "code",
"execution_count": 13,
"metadata": {
"collapsed": false
},
"outputs": [],
"source": [
"import pandas as pd\n",
"import numpy as np"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 2. Import the dataset from this [address](https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data). "
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 3. Assign it to a variable called iris"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
"text/html": [
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"text/plain": [
" 5.1 3.5 1.4 0.2 Iris-setosa\n",
"0 4.9 3.0 1.4 0.2 Iris-setosa\n",
"1 4.7 3.2 1.3 0.2 Iris-setosa\n",
"2 4.6 3.1 1.5 0.2 Iris-setosa\n",
"3 5.0 3.6 1.4 0.2 Iris-setosa\n",
"4 5.4 3.9 1.7 0.4 Iris-setosa"
]
},
"execution_count": 3,
"metadata": {},
"output_type": "execute_result"
}
],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 4. Create columns for the dataset"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
"text/html": [
"\n",
"
\n",
" \n",
" \n",
" | \n",
" sepal_length | \n",
" sepal_width | \n",
" petal_length | \n",
" petal_width | \n",
" class | \n",
"
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" \n",
" \n",
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" | 0 | \n",
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],
"text/plain": [
" sepal_length sepal_width petal_length petal_width class\n",
"0 4.9 3.0 1.4 0.2 Iris-setosa\n",
"1 4.7 3.2 1.3 0.2 Iris-setosa\n",
"2 4.6 3.1 1.5 0.2 Iris-setosa\n",
"3 5.0 3.6 1.4 0.2 Iris-setosa\n",
"4 5.4 3.9 1.7 0.4 Iris-setosa"
]
},
"execution_count": 5,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# 1. sepal_length (in cm)\n",
"# 2. sepal_width (in cm)\n",
"# 3. petal_length (in cm)\n",
"# 4. petal_width (in cm)\n",
"# 5. class"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 5. Is there any missing value in the dataframe?"
]
},
{
"cell_type": "code",
"execution_count": 11,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
"text/plain": [
"sepal_length 0\n",
"sepal_width 0\n",
"petal_length 0\n",
"petal_width 0\n",
"class 0\n",
"dtype: int64"
]
},
"execution_count": 11,
"metadata": {},
"output_type": "execute_result"
}
],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 6. Lets set the values of the rows 10 to 29 of the column 'petal_length' to NaN"
]
},
{
"cell_type": "code",
"execution_count": 36,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
"text/html": [
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" | 17 | \n",
" 5.7 | \n",
" 3.8 | \n",
" NaN | \n",
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" Iris-setosa | \n",
"
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" | 18 | \n",
" 5.1 | \n",
" 3.8 | \n",
" NaN | \n",
" 0.3 | \n",
" Iris-setosa | \n",
"
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" | 19 | \n",
" 5.4 | \n",
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],
"text/plain": [
" sepal_length sepal_width petal_length petal_width class\n",
"0 4.9 3.0 1.4 0.2 Iris-setosa\n",
"1 4.7 3.2 1.3 0.2 Iris-setosa\n",
"2 4.6 3.1 1.5 0.2 Iris-setosa\n",
"3 5.0 3.6 1.4 0.2 Iris-setosa\n",
"4 5.4 3.9 1.7 0.4 Iris-setosa\n",
"5 4.6 3.4 1.4 0.3 Iris-setosa\n",
"6 5.0 3.4 1.5 0.2 Iris-setosa\n",
"7 4.4 2.9 1.4 0.2 Iris-setosa\n",
"8 4.9 3.1 1.5 0.1 Iris-setosa\n",
"9 5.4 3.7 1.5 0.2 Iris-setosa\n",
"10 4.8 3.4 NaN 0.2 Iris-setosa\n",
"11 4.8 3.0 NaN 0.1 Iris-setosa\n",
"12 4.3 3.0 NaN 0.1 Iris-setosa\n",
"13 5.8 4.0 NaN 0.2 Iris-setosa\n",
"14 5.7 4.4 NaN 0.4 Iris-setosa\n",
"15 5.4 3.9 NaN 0.4 Iris-setosa\n",
"16 5.1 3.5 NaN 0.3 Iris-setosa\n",
"17 5.7 3.8 NaN 0.3 Iris-setosa\n",
"18 5.1 3.8 NaN 0.3 Iris-setosa\n",
"19 5.4 3.4 NaN 0.2 Iris-setosa"
]
},
"execution_count": 36,
"metadata": {},
"output_type": "execute_result"
}
],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 7. Good, now lets substitute the NaN values to 1.0"
]
},
{
"cell_type": "code",
"execution_count": 39,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
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" | 123 | \n",
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" | 124 | \n",
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" | 125 | \n",
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" \n",
" | 126 | \n",
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" \n",
" | 127 | \n",
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" \n",
" | 128 | \n",
" 7.2 | \n",
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" 5.8 | \n",
" 1.6 | \n",
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" | 129 | \n",
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" | 134 | \n",
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" Iris-virginica | \n",
"
\n",
" \n",
" | 135 | \n",
" 6.3 | \n",
" 3.4 | \n",
" 5.6 | \n",
" 2.4 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 136 | \n",
" 6.4 | \n",
" 3.1 | \n",
" 5.5 | \n",
" 1.8 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 137 | \n",
" 6.0 | \n",
" 3.0 | \n",
" 4.8 | \n",
" 1.8 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 138 | \n",
" 6.9 | \n",
" 3.1 | \n",
" 5.4 | \n",
" 2.1 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 139 | \n",
" 6.7 | \n",
" 3.1 | \n",
" 5.6 | \n",
" 2.4 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 140 | \n",
" 6.9 | \n",
" 3.1 | \n",
" 5.1 | \n",
" 2.3 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 141 | \n",
" 5.8 | \n",
" 2.7 | \n",
" 5.1 | \n",
" 1.9 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 142 | \n",
" 6.8 | \n",
" 3.2 | \n",
" 5.9 | \n",
" 2.3 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 143 | \n",
" 6.7 | \n",
" 3.3 | \n",
" 5.7 | \n",
" 2.5 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 144 | \n",
" 6.7 | \n",
" 3.0 | \n",
" 5.2 | \n",
" 2.3 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 145 | \n",
" 6.3 | \n",
" 2.5 | \n",
" 5.0 | \n",
" 1.9 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 146 | \n",
" 6.5 | \n",
" 3.0 | \n",
" 5.2 | \n",
" 2.0 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 147 | \n",
" 6.2 | \n",
" 3.4 | \n",
" 5.4 | \n",
" 2.3 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
" | 148 | \n",
" 5.9 | \n",
" 3.0 | \n",
" 5.1 | \n",
" 1.8 | \n",
" Iris-virginica | \n",
"
\n",
" \n",
"
\n",
"
149 rows × 5 columns
\n",
"
"
],
"text/plain": [
" sepal_length sepal_width petal_length petal_width class\n",
"0 4.9 3.0 1.4 0.2 Iris-setosa\n",
"1 4.7 3.2 1.3 0.2 Iris-setosa\n",
"2 4.6 3.1 1.5 0.2 Iris-setosa\n",
"3 5.0 3.6 1.4 0.2 Iris-setosa\n",
"4 5.4 3.9 1.7 0.4 Iris-setosa\n",
"5 4.6 3.4 1.4 0.3 Iris-setosa\n",
"6 5.0 3.4 1.5 0.2 Iris-setosa\n",
"7 4.4 2.9 1.4 0.2 Iris-setosa\n",
"8 4.9 3.1 1.5 0.1 Iris-setosa\n",
"9 5.4 3.7 1.5 0.2 Iris-setosa\n",
"10 4.8 3.4 1.0 0.2 Iris-setosa\n",
"11 4.8 3.0 1.0 0.1 Iris-setosa\n",
"12 4.3 3.0 1.0 0.1 Iris-setosa\n",
"13 5.8 4.0 1.0 0.2 Iris-setosa\n",
"14 5.7 4.4 1.0 0.4 Iris-setosa\n",
"15 5.4 3.9 1.0 0.4 Iris-setosa\n",
"16 5.1 3.5 1.0 0.3 Iris-setosa\n",
"17 5.7 3.8 1.0 0.3 Iris-setosa\n",
"18 5.1 3.8 1.0 0.3 Iris-setosa\n",
"19 5.4 3.4 1.0 0.2 Iris-setosa\n",
"20 5.1 3.7 1.0 0.4 Iris-setosa\n",
"21 4.6 3.6 1.0 0.2 Iris-setosa\n",
"22 5.1 3.3 1.0 0.5 Iris-setosa\n",
"23 4.8 3.4 1.0 0.2 Iris-setosa\n",
"24 5.0 3.0 1.0 0.2 Iris-setosa\n",
"25 5.0 3.4 1.0 0.4 Iris-setosa\n",
"26 5.2 3.5 1.0 0.2 Iris-setosa\n",
"27 5.2 3.4 1.0 0.2 Iris-setosa\n",
"28 4.7 3.2 1.0 0.2 Iris-setosa\n",
"29 4.8 3.1 1.0 0.2 Iris-setosa\n",
".. ... ... ... ... ...\n",
"119 6.9 3.2 5.7 2.3 Iris-virginica\n",
"120 5.6 2.8 4.9 2.0 Iris-virginica\n",
"121 7.7 2.8 6.7 2.0 Iris-virginica\n",
"122 6.3 2.7 4.9 1.8 Iris-virginica\n",
"123 6.7 3.3 5.7 2.1 Iris-virginica\n",
"124 7.2 3.2 6.0 1.8 Iris-virginica\n",
"125 6.2 2.8 4.8 1.8 Iris-virginica\n",
"126 6.1 3.0 4.9 1.8 Iris-virginica\n",
"127 6.4 2.8 5.6 2.1 Iris-virginica\n",
"128 7.2 3.0 5.8 1.6 Iris-virginica\n",
"129 7.4 2.8 6.1 1.9 Iris-virginica\n",
"130 7.9 3.8 6.4 2.0 Iris-virginica\n",
"131 6.4 2.8 5.6 2.2 Iris-virginica\n",
"132 6.3 2.8 5.1 1.5 Iris-virginica\n",
"133 6.1 2.6 5.6 1.4 Iris-virginica\n",
"134 7.7 3.0 6.1 2.3 Iris-virginica\n",
"135 6.3 3.4 5.6 2.4 Iris-virginica\n",
"136 6.4 3.1 5.5 1.8 Iris-virginica\n",
"137 6.0 3.0 4.8 1.8 Iris-virginica\n",
"138 6.9 3.1 5.4 2.1 Iris-virginica\n",
"139 6.7 3.1 5.6 2.4 Iris-virginica\n",
"140 6.9 3.1 5.1 2.3 Iris-virginica\n",
"141 5.8 2.7 5.1 1.9 Iris-virginica\n",
"142 6.8 3.2 5.9 2.3 Iris-virginica\n",
"143 6.7 3.3 5.7 2.5 Iris-virginica\n",
"144 6.7 3.0 5.2 2.3 Iris-virginica\n",
"145 6.3 2.5 5.0 1.9 Iris-virginica\n",
"146 6.5 3.0 5.2 2.0 Iris-virginica\n",
"147 6.2 3.4 5.4 2.3 Iris-virginica\n",
"148 5.9 3.0 5.1 1.8 Iris-virginica\n",
"\n",
"[149 rows x 5 columns]"
]
},
"execution_count": 39,
"metadata": {},
"output_type": "execute_result"
}
],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 8. Now let's delete the column class"
]
},
{
"cell_type": "code",
"execution_count": 40,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
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"text/plain": [
" sepal_length sepal_width petal_length petal_width\n",
"0 4.9 3.0 1.4 0.2\n",
"1 4.7 3.2 1.3 0.2\n",
"2 4.6 3.1 1.5 0.2\n",
"3 5.0 3.6 1.4 0.2\n",
"4 5.4 3.9 1.7 0.4"
]
},
"execution_count": 40,
"metadata": {},
"output_type": "execute_result"
}
],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 9. Set the first 3 rows as NaN"
]
},
{
"cell_type": "code",
"execution_count": 52,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
"text/html": [
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"text/plain": [
" sepal_length sepal_width petal_length petal_width\n",
"0 NaN NaN NaN NaN\n",
"1 NaN NaN NaN NaN\n",
"2 NaN NaN NaN NaN\n",
"3 5.0 3.4 1.5 0.2\n",
"4 4.4 2.9 1.4 0.2"
]
},
"execution_count": 52,
"metadata": {},
"output_type": "execute_result"
}
],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 10. Delete the rows that have NaN"
]
},
{
"cell_type": "code",
"execution_count": 53,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
"text/html": [
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"text/plain": [
" sepal_length sepal_width petal_length petal_width\n",
"3 5.0 3.4 1.5 0.2\n",
"4 4.4 2.9 1.4 0.2\n",
"5 4.9 3.1 1.5 0.1\n",
"6 5.4 3.7 1.5 0.2\n",
"7 4.8 3.4 1.0 0.2"
]
},
"execution_count": 53,
"metadata": {},
"output_type": "execute_result"
}
],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Step 11. Reset the index so it begins with 0 again"
]
},
{
"cell_type": "code",
"execution_count": 56,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
"text/html": [
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"text/plain": [
" sepal_length sepal_width petal_length petal_width\n",
"0 5.0 3.4 1.5 0.2\n",
"1 4.4 2.9 1.4 0.2\n",
"2 4.9 3.1 1.5 0.1\n",
"3 5.4 3.7 1.5 0.2\n",
"4 4.8 3.4 1.0 0.2"
]
},
"execution_count": 56,
"metadata": {},
"output_type": "execute_result"
}
],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### BONUS: Create your own question and answer it."
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 2",
"language": "python",
"name": "python2"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 2
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
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