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lec02

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master
Mokhov Andrey 2 лет назад
Родитель 8841d35d2d
Сommit 5efd2f6a9f
3 изменённых файлов: 634 добавлений и 0 удалений
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lections/OATD_lec_2.pdf
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lections/OATD_lec_2.pptx
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lections/notebooks/lec2_preprocess.ipynb
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{
"cells": [
{
"cell_type": "code",
"execution_count": 51,
"metadata": {},
"outputs": [],
"source": [
"import numpy as np \n",
"import sklearn.metrics.pairwise as pw\n"
]
},
{
"cell_type": "code",
"execution_count": 52,
"metadata": {},
"outputs": [],
"source": [
"A = [[3, 4, 5]]\n",
"B = [[3, 5, 4]]\n",
"C = [[1, 2, 1]]\n"
]
},
{
"cell_type": "code",
"execution_count": 53,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Euclidean: \t [[1.41421356]]\n",
"Cosine: \t [[0.98]]\n",
"Manhattan: \t [[2.]]\n"
]
}
],
"source": [
"print('Euclidean: \\t',pw.euclidean_distances(A, B))\n",
"print('Cosine: \\t',pw.cosine_similarity(A, B))\n",
"print('Manhattan: \\t',pw.manhattan_distances(A, B))"
]
},
{
"cell_type": "code",
"execution_count": 54,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Euclidean: \t [[4.89897949]]\n",
"Cosine: \t [[0.92376043]]\n",
"Manhattan: \t [[8.]]\n"
]
}
],
"source": [
"print('Euclidean: \\t',pw.euclidean_distances(A, C))\n",
"print('Cosine: \\t',pw.cosine_similarity(A, C))\n",
"print('Manhattan: \\t',pw.manhattan_distances(A, C))"
]
},
{
"cell_type": "code",
"execution_count": 55,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Euclidean E-D: \t [[3.31662479]]\n",
"Euclidean E-F: \t [[2.82842712]]\n",
"\n",
"Cosine: E-D \t [[0.99014754]]\n",
"Cosine E-F: \t [[0.7592566]]\n",
"\n",
"Manhattan: E-D \t [[5.]]\n",
"Manhattan E-F: \t [[6.]]\n"
]
}
],
"source": [
"import sklearn.metrics.pairwise as pw\n",
"\n",
"D = [[6,0,0,3,3]]\n",
"E = [[3,0,0,2,2]]\n",
"F = [[1,1,1,1,1]]\n",
"\n",
"print('Euclidean E-D: \\t',pw.euclidean_distances(D, E))\n",
"print('Euclidean E-F: \\t',pw.euclidean_distances(E, F))\n",
"\n",
"print('\\nCosine: E-D \\t',pw.cosine_similarity(D, E))\n",
"print('Cosine E-F: \\t',pw.cosine_similarity(E, F))\n",
"\n",
"print('\\nManhattan: E-D \\t',pw.manhattan_distances(D, E))\n",
"print('Manhattan E-F: \\t',pw.manhattan_distances(E, F))"
]
},
{
"cell_type": "code",
"execution_count": 56,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"<div>\n",
"<style scoped>\n",
" .dataframe tbody tr th:only-of-type {\n",
" vertical-align: middle;\n",
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"\n",
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" vertical-align: top;\n",
" }\n",
"\n",
" .dataframe thead th {\n",
" text-align: right;\n",
" }\n",
"</style>\n",
"<table border=\"1\" class=\"dataframe\">\n",
" <thead>\n",
" <tr style=\"text-align: right;\">\n",
" <th></th>\n",
" <th>A</th>\n",
" <th>B</th>\n",
" <th>C</th>\n",
" <th>D</th>\n",
" </tr>\n",
" </thead>\n",
" <tbody>\n",
" <tr>\n",
" <th>0</th>\n",
" <td>1.0</td>\n",
" <td>red</td>\n",
" <td>3300</td>\n",
" <td>MSK</td>\n",
" </tr>\n",
" <tr>\n",
" <th>1</th>\n",
" <td>2.0</td>\n",
" <td>red</td>\n",
" <td>1250</td>\n",
" <td>SPB</td>\n",
" </tr>\n",
" <tr>\n",
" <th>2</th>\n",
" <td>NaN</td>\n",
" <td>yellow</td>\n",
" <td>4600</td>\n",
" <td>EKB</td>\n",
" </tr>\n",
" <tr>\n",
" <th>3</th>\n",
" <td>2.0</td>\n",
" <td>green</td>\n",
" <td>4500</td>\n",
" <td>MSK</td>\n",
" </tr>\n",
" </tbody>\n",
"</table>\n",
"</div>"
],
"text/plain": [
" A B C D\n",
"0 1.0 red 3300 MSK\n",
"1 2.0 red 1250 SPB\n",
"2 NaN yellow 4600 EKB\n",
"3 2.0 green 4500 MSK"
]
},
"execution_count": 56,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"import pandas as pd\n",
"dataset = pd.DataFrame({'A': [1 , 2, None, 2], \n",
" 'B': ['red', 'red', 'yellow', 'green'], \n",
" 'C': [3300, 1250, 4600, 4500],\n",
" 'D': ['MSK', 'SPB', 'EKB', 'MSK']})\n",
"dataset"
]
},
{
"cell_type": "code",
"execution_count": 57,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"<div>\n",
"<style scoped>\n",
" .dataframe tbody tr th:only-of-type {\n",
" vertical-align: middle;\n",
" }\n",
"\n",
" .dataframe tbody tr th {\n",
" vertical-align: top;\n",
" }\n",
"\n",
" .dataframe thead th {\n",
" text-align: right;\n",
" }\n",
"</style>\n",
"<table border=\"1\" class=\"dataframe\">\n",
" <thead>\n",
" <tr style=\"text-align: right;\">\n",
" <th></th>\n",
" <th>A</th>\n",
" <th>C</th>\n",
" <th>D</th>\n",
" <th>B_green</th>\n",
" <th>B_red</th>\n",
" <th>B_yellow</th>\n",
" </tr>\n",
" </thead>\n",
" <tbody>\n",
" <tr>\n",
" <th>0</th>\n",
" <td>1.0</td>\n",
" <td>3300</td>\n",
" <td>MSK</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" </tr>\n",
" <tr>\n",
" <th>1</th>\n",
" <td>2.0</td>\n",
" <td>1250</td>\n",
" <td>SPB</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" </tr>\n",
" <tr>\n",
" <th>2</th>\n",
" <td>NaN</td>\n",
" <td>4600</td>\n",
" <td>EKB</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" </tr>\n",
" <tr>\n",
" <th>3</th>\n",
" <td>2.0</td>\n",
" <td>4500</td>\n",
" <td>MSK</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" </tr>\n",
" </tbody>\n",
"</table>\n",
"</div>"
],
"text/plain": [
" A C D B_green B_red B_yellow\n",
"0 1.0 3300 MSK 0 1 0\n",
"1 2.0 1250 SPB 0 1 0\n",
"2 NaN 4600 EKB 0 0 1\n",
"3 2.0 4500 MSK 1 0 0"
]
},
"execution_count": 57,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# OHE encoding\n",
"dataset = pd.get_dummies(dataset, columns = ['B'])\n",
"dataset"
]
},
{
"cell_type": "code",
"execution_count": 58,
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"LabelEncoder()"
]
},
"execution_count": 58,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# Label encoding\n",
"from sklearn import preprocessing\n",
"le = preprocessing.LabelEncoder()\n",
"le.fit(dataset['D'])"
]
},
{
"cell_type": "code",
"execution_count": 59,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"<div>\n",
"<style scoped>\n",
" .dataframe tbody tr th:only-of-type {\n",
" vertical-align: middle;\n",
" }\n",
"\n",
" .dataframe tbody tr th {\n",
" vertical-align: top;\n",
" }\n",
"\n",
" .dataframe thead th {\n",
" text-align: right;\n",
" }\n",
"</style>\n",
"<table border=\"1\" class=\"dataframe\">\n",
" <thead>\n",
" <tr style=\"text-align: right;\">\n",
" <th></th>\n",
" <th>A</th>\n",
" <th>C</th>\n",
" <th>D</th>\n",
" <th>B_green</th>\n",
" <th>B_red</th>\n",
" <th>B_yellow</th>\n",
" </tr>\n",
" </thead>\n",
" <tbody>\n",
" <tr>\n",
" <th>0</th>\n",
" <td>1.0</td>\n",
" <td>3300</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" </tr>\n",
" <tr>\n",
" <th>1</th>\n",
" <td>2.0</td>\n",
" <td>1250</td>\n",
" <td>2</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" </tr>\n",
" <tr>\n",
" <th>2</th>\n",
" <td>NaN</td>\n",
" <td>4600</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" </tr>\n",
" <tr>\n",
" <th>3</th>\n",
" <td>2.0</td>\n",
" <td>4500</td>\n",
" <td>1</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" </tr>\n",
" </tbody>\n",
"</table>\n",
"</div>"
],
"text/plain": [
" A C D B_green B_red B_yellow\n",
"0 1.0 3300 1 0 1 0\n",
"1 2.0 1250 2 0 1 0\n",
"2 NaN 4600 0 0 0 1\n",
"3 2.0 4500 1 1 0 0"
]
},
"execution_count": 59,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"dataset['D'] = le.transform(dataset['D'])\n",
"dataset"
]
},
{
"cell_type": "code",
"execution_count": 60,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"<div>\n",
"<style scoped>\n",
" .dataframe tbody tr th:only-of-type {\n",
" vertical-align: middle;\n",
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" vertical-align: top;\n",
" }\n",
"\n",
" .dataframe thead th {\n",
" text-align: right;\n",
" }\n",
"</style>\n",
"<table border=\"1\" class=\"dataframe\">\n",
" <thead>\n",
" <tr style=\"text-align: right;\">\n",
" <th></th>\n",
" <th>A</th>\n",
" <th>C</th>\n",
" <th>D</th>\n",
" <th>B_green</th>\n",
" <th>B_red</th>\n",
" <th>B_yellow</th>\n",
" </tr>\n",
" </thead>\n",
" <tbody>\n",
" <tr>\n",
" <th>0</th>\n",
" <td>1.000000</td>\n",
" <td>3300</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" </tr>\n",
" <tr>\n",
" <th>1</th>\n",
" <td>2.000000</td>\n",
" <td>1250</td>\n",
" <td>2</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" </tr>\n",
" <tr>\n",
" <th>2</th>\n",
" <td>1.666667</td>\n",
" <td>4600</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" </tr>\n",
" <tr>\n",
" <th>3</th>\n",
" <td>2.000000</td>\n",
" <td>4500</td>\n",
" <td>1</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" </tr>\n",
" </tbody>\n",
"</table>\n",
"</div>"
],
"text/plain": [
" A C D B_green B_red B_yellow\n",
"0 1.000000 3300 1 0 1 0\n",
"1 2.000000 1250 2 0 1 0\n",
"2 1.666667 4600 0 0 0 1\n",
"3 2.000000 4500 1 1 0 0"
]
},
"execution_count": 60,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# Заполняем пропущенные данные\n",
"dataset['A'] = dataset['A'].fillna(np.mean(dataset['A']))\n",
"dataset"
]
},
{
"cell_type": "code",
"execution_count": 64,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
"<div>\n",
"<style scoped>\n",
" .dataframe tbody tr th:only-of-type {\n",
" vertical-align: middle;\n",
" }\n",
"\n",
" .dataframe tbody tr th {\n",
" vertical-align: top;\n",
" }\n",
"\n",
" .dataframe thead th {\n",
" text-align: right;\n",
" }\n",
"</style>\n",
"<table border=\"1\" class=\"dataframe\">\n",
" <thead>\n",
" <tr style=\"text-align: right;\">\n",
" <th></th>\n",
" <th>A</th>\n",
" <th>C</th>\n",
" <th>D</th>\n",
" <th>B_green</th>\n",
" <th>B_red</th>\n",
" <th>B_yellow</th>\n",
" <th>C_normalized</th>\n",
" <th>C_standardized</th>\n",
" </tr>\n",
" </thead>\n",
" <tbody>\n",
" <tr>\n",
" <th>0</th>\n",
" <td>1.000000</td>\n",
" <td>3300</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" <td>0.611940</td>\n",
" <td>-0.072209</td>\n",
" </tr>\n",
" <tr>\n",
" <th>1</th>\n",
" <td>2.000000</td>\n",
" <td>1250</td>\n",
" <td>2</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" <td>0.000000</td>\n",
" <td>-1.388018</td>\n",
" </tr>\n",
" <tr>\n",
" <th>2</th>\n",
" <td>1.666667</td>\n",
" <td>4600</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" <td>1</td>\n",
" <td>1.000000</td>\n",
" <td>0.762206</td>\n",
" </tr>\n",
" <tr>\n",
" <th>3</th>\n",
" <td>2.000000</td>\n",
" <td>4500</td>\n",
" <td>1</td>\n",
" <td>1</td>\n",
" <td>0</td>\n",
" <td>0</td>\n",
" <td>0.970149</td>\n",
" <td>0.698021</td>\n",
" </tr>\n",
" </tbody>\n",
"</table>\n",
"</div>"
],
"text/plain": [
" A C D B_green B_red B_yellow C_normalized C_standardized\n",
"0 1.000000 3300 1 0 1 0 0.611940 -0.072209\n",
"1 2.000000 1250 2 0 1 0 0.000000 -1.388018\n",
"2 1.666667 4600 0 0 0 1 1.000000 0.762206\n",
"3 2.000000 4500 1 1 0 0 0.970149 0.698021"
]
},
"execution_count": 64,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"dataset['C_normalized'] = (dataset['C'] - dataset['C'].min()) / (dataset['C'].max() - dataset['C'].min())\n",
"dataset['C_standardized'] = (dataset['C'] - dataset['C'].mean()) / dataset['C'].std()\n",
"dataset"
]
},
{
"cell_type": "code",
"execution_count": 63,
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.8.3"
}
},
"nbformat": 4,
"nbformat_minor": 4
}
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