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@szdr
Created March 30, 2017 10:29
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{
"cells": [
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": true,
"deletable": true,
"editable": true
},
"outputs": [],
"source": [
"%matplotlib inline\n",
"import numpy as np\n",
"import matplotlib.pyplot as plt"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": true,
"deletable": true,
"editable": true
},
"outputs": [],
"source": [
"X = np.array([1018.4, 1007.6, 1006.2, 1009.9, 1010.8, 1013.2, 1016.2, 1009.1, 1003.1, 1012.5, 1006.4, 1006.3, 1012.2, 1015.0, 1017.4, 1016.5, 1012.1, 1008.7, 1009.2, 1009.2])\n",
"Y = np.array([1019.4, 1005.7, 1002.0, 1006.7, 1005.1, 1010.1, 1016.7, 1011.0, 999.5, 1006.9, 1001.9, 1007.5, 1014.4, 1014.3, 1014.6, 1009.0, 1006.7, 1009.4, 1011.8, 1009.4])"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {
"collapsed": false,
"deletable": true,
"editable": true
},
"outputs": [
{
"data": {
"text/plain": [
"(995, 1020)"
]
},
"execution_count": 3,
"metadata": {},
"output_type": "execute_result"
},
{
"data": {
"image/png": 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"text/plain": [
"<matplotlib.figure.Figure at 0x7f5675528ef0>"
]
},
"metadata": {},
"output_type": "display_data"
}
],
"source": [
"plt.scatter(X, Y)\n",
"plt.xlabel(\"(x)\")\n",
"plt.ylabel(\"(y)\")\n",
"plt.xlim(1000, 1020)\n",
"plt.ylim(995, 1020)"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {
"collapsed": false,
"deletable": true,
"editable": true
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"beta1: 16.08757061136646, beta2: 0.982213085448698\n"
]
}
],
"source": [
"beta2 = np.sum((X - np.mean(X)) * (Y - np.mean(Y))) / np.sum((X - np.mean(X)) ** 2)\n",
"beta1 = np.mean(Y) - beta2 * np.mean(X)\n",
"print(\"beta1: {}, beta2: {}\".format(beta1, beta2))"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"collapsed": false,
"deletable": true,
"editable": true
},
"outputs": [
{
"data": {
"text/plain": [
"(995, 1020)"
]
},
"execution_count": 5,
"metadata": {},
"output_type": "execute_result"
},
{
"data": {
"image/png": 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R1KXASRLuzmsFu5iWl8/KzSX0bJ/Fz748nEkjupOe1iTe5Z1Q9WWy6lFqbbIy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\n",
"text/plain": [
"<matplotlib.figure.Figure at 0x7f5673219240>"
]
},
"metadata": {},
"output_type": "display_data"
}
],
"source": [
"plt.scatter(X, Y)\n",
"xx = np.linspace(np.min(X), np.max(X), 100)\n",
"yy = xx * beta2 + beta1\n",
"plt.plot(xx, yy)\n",
"plt.xlabel(\"(x)\")\n",
"plt.ylabel(\"(y)\")\n",
"plt.xlim(1000, 1020)\n",
"plt.ylim(995, 1020)"
]
},
{
"cell_type": "code",
"execution_count": 6,
"metadata": {
"collapsed": false,
"deletable": true,
"editable": true
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"standard error: 3.1482209448805882, coefficient of determination: 0.6447631673233438\n"
]
}
],
"source": [
"es = Y - (beta2 * X + beta1)\n",
"se = np.sqrt(np.sum(es ** 2) / (X.shape[0] - 2))\n",
"eta2 = 1 - np.sum(es ** 2) / np.sum((Y - np.mean(Y)) ** 2)\n",
"print(\"standard error: {}, coefficient of determination: {}\".format(se, eta2))"
]
},
{
"cell_type": "code",
"execution_count": 7,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
"text/plain": [
"<matplotlib.text.Text at 0x7f5673129240>"
]
},
"execution_count": 7,
"metadata": {},
"output_type": "execute_result"
},
{
"data": {
"image/png": 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uQmCC\n",
"text/plain": [
"<matplotlib.figure.Figure at 0x7f56731538d0>"
]
},
"metadata": {},
"output_type": "display_data"
}
],
"source": [
"xx = np.arange(es.shape[0]) + 1\n",
"plt.scatter(xx, es)\n",
"plt.plot(xx, np.zeros_like(xx), color=\"k\")\n",
"plt.plot(xx, np.zeros_like(xx) + se, color=\"k\", ls=\":\")\n",
"plt.plot(xx, np.zeros_like(xx) - se, color=\"k\", ls=\":\")\n",
"plt.plot(xx, np.zeros_like(xx) + 2 * se, color=\"k\", ls=\"--\")\n",
"plt.plot(xx, np.zeros_like(xx) - 2 * se, color=\"k\", ls=\"--\")\n",
"yticks = np.r_[np.arange(-7.5, 7.6, 2.5), np.array([-2 * se, -se, se, 2 * se])]\n",
"yticklabels=np.r_[np.arange(-7.5, 7.6, 2.5), np.array([\"-2s\", \"-s\", \"s\", \"2s\"])]\n",
"_ = plt.yticks(yticks, yticklabels)\n",
"_ = plt.xticks(xx)\n",
"plt.ylabel(\"residual\")"
]
},
{
"cell_type": "code",
"execution_count": 8,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"t2: 5.715804525698464\n"
]
}
],
"source": [
"se_beta2 = se / np.sqrt(np.sum((X - np.mean(X)) ** 2))\n",
"t2 = beta2 / se_beta2\n",
"print(\"t2: {}\".format(t2))"
]
}
],
"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": "3.6.0"
}
},
"nbformat": 4,
"nbformat_minor": 2
}
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