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ISLR/notebooks/.ipynb_checkpoints/3.6.2.R-checkpoint.ipynb
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ISLR/notebooks/.ipynb_checkpoints/3.6.2.R-checkpoint.ipynb
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"cells": [
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"cell_type": "code",
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"execution_count": 5,
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"metadata": {},
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"outputs": [],
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"source": [
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"library(MASS)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 6,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/html": [
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"\n",
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"<table width=\"100%\" summary=\"page for Boston {MASS}\"><tr><td>Boston {MASS}</td><td style=\"text-align: right;\">R Documentation</td></tr></table>\n",
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"\n",
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"<h2>\n",
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"Housing Values in Suburbs of Boston\n",
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"</h2>\n",
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"\n",
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"<h3>Description</h3>\n",
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"\n",
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"<p>The <code>Boston</code> data frame has 506 rows and 14 columns.\n",
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"</p>\n",
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"\n",
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"\n",
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"<h3>Usage</h3>\n",
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"\n",
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"<pre>\n",
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"Boston\n",
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"</pre>\n",
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"\n",
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"\n",
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"<h3>Format</h3>\n",
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"\n",
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"<p>This data frame contains the following columns:\n",
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"</p>\n",
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"\n",
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"<dl>\n",
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"<dt><code>crim</code></dt><dd>\n",
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"<p>per capita crime rate by town.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>zn</code></dt><dd>\n",
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"<p>proportion of residential land zoned for lots over 25,000 sq.ft.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>indus</code></dt><dd>\n",
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"<p>proportion of non-retail business acres per town.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>chas</code></dt><dd>\n",
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"<p>Charles River dummy variable (= 1 if tract bounds river; 0 otherwise).\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>nox</code></dt><dd>\n",
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"<p>nitrogen oxides concentration (parts per 10 million).\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>rm</code></dt><dd>\n",
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"<p>average number of rooms per dwelling.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>age</code></dt><dd>\n",
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"<p>proportion of owner-occupied units built prior to 1940.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>dis</code></dt><dd>\n",
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"<p>weighted mean of distances to five Boston employment centres.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>rad</code></dt><dd>\n",
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"<p>index of accessibility to radial highways.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>tax</code></dt><dd>\n",
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"<p>full-value property-tax rate per \\$10,000.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>ptratio</code></dt><dd>\n",
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"<p>pupil-teacher ratio by town.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>black</code></dt><dd>\n",
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"<p><i>1000(Bk - 0.63)^2</i> where <i>Bk</i> is the proportion of blacks\n",
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"by town.\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>lstat</code></dt><dd>\n",
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"<p>lower status of the population (percent).\n",
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"</p>\n",
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"</dd>\n",
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"<dt><code>medv</code></dt><dd>\n",
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"<p>median value of owner-occupied homes in \\$1000s.\n",
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"</p>\n",
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"</dd>\n",
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"</dl>\n",
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"\n",
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"\n",
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"\n",
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"<h3>Source</h3>\n",
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"\n",
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"<p>Harrison, D. and Rubinfeld, D.L. (1978)\n",
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"Hedonic prices and the demand for clean air.\n",
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"<em>J. Environ. Economics and Management</em>\n",
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"<b>5</b>, 81–102.\n",
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"</p>\n",
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"<p>Belsley D.A., Kuh, E. and Welsch, R.E. (1980)\n",
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"<em>Regression Diagnostics. Identifying Influential Data and Sources\n",
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"of Collinearity.</em>\n",
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"New York: Wiley.\n",
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"</p>\n",
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"\n",
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"<hr /><div style=\"text-align: center;\">[Package <em>MASS</em> version 7.3-51.5 ]</div>"
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],
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"text/latex": [
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"\\inputencoding{utf8}\n",
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"\\HeaderA{Boston}{Housing Values in Suburbs of Boston}{Boston}\n",
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"\\keyword{datasets}{Boston}\n",
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"%\n",
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"\\begin{Description}\\relax\n",
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"The \\code{Boston} data frame has 506 rows and 14 columns.\n",
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"\\end{Description}\n",
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"%\n",
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"\\begin{Usage}\n",
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"\\begin{verbatim}\n",
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"Boston\n",
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"\\end{verbatim}\n",
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"\\end{Usage}\n",
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"%\n",
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"\\begin{Format}\n",
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"This data frame contains the following columns:\n",
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"\\begin{description}\n",
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"\n",
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"\\item[\\code{crim}] \n",
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"per capita crime rate by town.\n",
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"\n",
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"\\item[\\code{zn}] \n",
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"proportion of residential land zoned for lots over 25,000 sq.ft.\n",
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"\n",
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"\\item[\\code{indus}] \n",
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"proportion of non-retail business acres per town.\n",
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"\n",
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"\\item[\\code{chas}] \n",
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"Charles River dummy variable (= 1 if tract bounds river; 0 otherwise).\n",
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"\n",
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"\\item[\\code{nox}] \n",
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"nitrogen oxides concentration (parts per 10 million).\n",
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"\n",
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"\\item[\\code{rm}] \n",
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"average number of rooms per dwelling.\n",
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"\n",
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"\\item[\\code{age}] \n",
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"proportion of owner-occupied units built prior to 1940.\n",
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"\n",
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"\\item[\\code{dis}] \n",
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"weighted mean of distances to five Boston employment centres.\n",
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"\n",
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"\\item[\\code{rad}] \n",
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"index of accessibility to radial highways.\n",
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"\n",
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"\\item[\\code{tax}] \n",
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"full-value property-tax rate per \\bsl{}\\$10,000.\n",
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"\n",
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"\\item[\\code{ptratio}] \n",
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"pupil-teacher ratio by town.\n",
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"\n",
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"\\item[\\code{black}] \n",
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"\\eqn{1000(Bk - 0.63)^2}{} where \\eqn{Bk}{} is the proportion of blacks\n",
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"by town.\n",
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"\n",
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"\\item[\\code{lstat}] \n",
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"lower status of the population (percent).\n",
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"\n",
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"\\item[\\code{medv}] \n",
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"median value of owner-occupied homes in \\bsl{}\\$1000s.\n",
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"\n",
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"\n",
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"\\end{description}\n",
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"\n",
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"\\end{Format}\n",
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"%\n",
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"\\begin{Source}\\relax\n",
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"Harrison, D. and Rubinfeld, D.L. (1978)\n",
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"Hedonic prices and the demand for clean air.\n",
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"\\emph{J. Environ. Economics and Management}\n",
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"\\bold{5}, 81--102.\n",
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"\n",
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"Belsley D.A., Kuh, E. and Welsch, R.E. (1980)\n",
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"\\emph{Regression Diagnostics. Identifying Influential Data and Sources\n",
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"of Collinearity.}\n",
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"New York: Wiley.\n",
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"\\end{Source}"
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],
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"text/plain": [
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"Boston package:MASS R Documentation\n",
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"\n",
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"_\bH_\bo_\bu_\bs_\bi_\bn_\bg _\bV_\ba_\bl_\bu_\be_\bs _\bi_\bn _\bS_\bu_\bb_\bu_\br_\bb_\bs _\bo_\bf _\bB_\bo_\bs_\bt_\bo_\bn\n",
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"\n",
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"_\bD_\be_\bs_\bc_\br_\bi_\bp_\bt_\bi_\bo_\bn:\n",
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"\n",
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" The ‘Boston’ data frame has 506 rows and 14 columns.\n",
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"\n",
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"_\bU_\bs_\ba_\bg_\be:\n",
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"\n",
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" Boston\n",
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" \n",
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"_\bF_\bo_\br_\bm_\ba_\bt:\n",
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"\n",
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" This data frame contains the following columns:\n",
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"\n",
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" ‘crim’ per capita crime rate by town.\n",
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"\n",
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" ‘zn’ proportion of residential land zoned for lots over 25,000\n",
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" sq.ft.\n",
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"\n",
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" ‘indus’ proportion of non-retail business acres per town.\n",
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"\n",
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" ‘chas’ Charles River dummy variable (= 1 if tract bounds river; 0\n",
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" otherwise).\n",
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"\n",
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" ‘nox’ nitrogen oxides concentration (parts per 10 million).\n",
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"\n",
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" ‘rm’ average number of rooms per dwelling.\n",
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"\n",
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" ‘age’ proportion of owner-occupied units built prior to 1940.\n",
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"\n",
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" ‘dis’ weighted mean of distances to five Boston employment\n",
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" centres.\n",
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"\n",
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" ‘rad’ index of accessibility to radial highways.\n",
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"\n",
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" ‘tax’ full-value property-tax rate per \\$10,000.\n",
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"\n",
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" ‘ptratio’ pupil-teacher ratio by town.\n",
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"\n",
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" ‘black’ 1000(Bk - 0.63)^2 where Bk is the proportion of blacks by\n",
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" town.\n",
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"\n",
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" ‘lstat’ lower status of the population (percent).\n",
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"\n",
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" ‘medv’ median value of owner-occupied homes in \\$1000s.\n",
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"\n",
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"_\bS_\bo_\bu_\br_\bc_\be:\n",
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"\n",
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" Harrison, D. and Rubinfeld, D.L. (1978) Hedonic prices and the\n",
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" demand for clean air. _J. Environ. Economics and Management_ *5*,\n",
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" 81-102.\n",
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"\n",
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" Belsley D.A., Kuh, E. and Welsch, R.E. (1980) _Regression\n",
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" Diagnostics. Identifying Influential Data and Sources of\n",
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" Collinearity._ New York: Wiley.\n"
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]
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},
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"metadata": {},
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"output_type": "display_data"
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}
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],
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"source": [
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"?Boston"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 23,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"\n",
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"Call:\n",
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"lm(formula = medv ~ lstat, data = Boston)\n",
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"\n",
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"Residuals:\n",
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" Min 1Q Median 3Q Max \n",
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"-15.168 -3.990 -1.318 2.034 24.500 \n",
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"\n",
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"Coefficients:\n",
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" Estimate Std. Error t value Pr(>|t|) \n",
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"(Intercept) 34.55384 0.56263 61.41 <2e-16 ***\n",
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"lstat -0.95005 0.03873 -24.53 <2e-16 ***\n",
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"---\n",
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"Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1\n",
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"\n",
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"Residual standard error: 6.216 on 504 degrees of freedom\n",
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"Multiple R-squared: 0.5441,\tAdjusted R-squared: 0.5432 \n",
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"F-statistic: 601.6 on 1 and 504 DF, p-value: < 2.2e-16\n"
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]
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},
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"metadata": {},
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"output_type": "display_data"
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}
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],
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"source": [
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"lm.fit = lm(medv~lstat, data=Boston)\n",
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"summary(lm.fit)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"source": []
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},
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"display_name": "R",
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"language": "R",
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"language_info": {
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"file_extension": ".r",
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"mimetype": "text/x-r-source",
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"name": "R",
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"pygments_lexer": "r",
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"version": "3.6.3"
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}
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"nbformat": 4,
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"nbformat_minor": 4
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}
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ISLR/notebooks/.ipynb_checkpoints/3.6.2.python-checkpoint.ipynb
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ISLR/notebooks/.ipynb_checkpoints/3.6.2.python-checkpoint.ipynb
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ISLR/notebooks/.ipynb_checkpoints/ch2-9-checkpoint.ipynb
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ISLR/notebooks/.ipynb_checkpoints/ch2-9-checkpoint.ipynb
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