{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Regressão Linear Simples com Descida de Gradiente\n", "\n", "A Regressão Linear é um método de aprendizagem de máquina supervisionada para prever rótulos contínuos em dados que seguem uma tendência linear.\n", "\n", "Por exemplo, a seguir temos representados num gráfico os preços de casas (eixo Y) de acordo com o seu tamanho (eixo X). Os preços são mostrados em dólares americanos e estão divididos por mil. Os tamanhos estão em \"square feet\" e também estão divididos por mil. Esses dados foram coletados em 1977, assim, os preços das casas são muito inferiores aos preços atuais.\n", "\n", "Tais dados são os dados de treinamento. Eles foram extraídos do link: http://people.sc.fsu.edu/~jburkardt/datasets/regression/x27.txt" ] }, { "cell_type": "code", "execution_count": 1, "metadata": { "scrolled": true }, "outputs": [ { "data": { "text/html": [ "\n", "
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*/\n", " safe: true,\n", " /* Index of renderer in `output_area.display_order` */\n", " index: 0\n", " });\n", " }\n", "\n", " // register the mime type if in Jupyter Notebook environment and previously unregistered\n", " if (root.Jupyter !== undefined) {\n", " var events = require('base/js/events');\n", " var OutputArea = require('notebook/js/outputarea').OutputArea;\n", "\n", " if (OutputArea.prototype.mime_types().indexOf(EXEC_MIME_TYPE) == -1) {\n", " register_renderer(events, OutputArea);\n", " }\n", " }\n", "\n", " \n", " if (typeof (root._bokeh_timeout) === \"undefined\" || force === true) {\n", " root._bokeh_timeout = Date.now() + 5000;\n", " root._bokeh_failed_load = false;\n", " }\n", "\n", " var NB_LOAD_WARNING = {'data': {'text/html':\n", " \"\\n\"+\n", " \"BokehJS does not appear to have successfully loaded. If loading BokehJS from CDN, this \\n\"+\n", " \"may be due to a slow or bad network connection. Possible fixes:\\n\"+\n", " \"
\\n\"+\n", " \"\\n\"+\n",
" \"from bokeh.resources import INLINE\\n\"+\n",
" \"output_notebook(resources=INLINE)\\n\"+\n",
" \"
\\n\"+\n",
" \"\\n\"+\n \"BokehJS does not appear to have successfully loaded. If loading BokehJS from CDN, this \\n\"+\n \"may be due to a slow or bad network connection. Possible fixes:\\n\"+\n \"
\\n\"+\n \"\\n\"+\n \"from bokeh.resources import INLINE\\n\"+\n \"output_notebook(resources=INLINE)\\n\"+\n \"
\\n\"+\n \"<Bokeh Notebook handle for In[1]>
<Bokeh Notebook handle for In[2]>
<Bokeh Notebook handle for In[7]>