【机器学习笔记】:从零开始学会逻辑回归(一)

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选择匿名的用户   2021-5-23 14:49   153   0
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<p style="margin-left:0em;min-height:1em;font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;color:rgb(62,62,62);font-size:16px;text-align:center;letter-spacing:1px;line-height:1.75em;"><span style="color:rgb(127,127,127);font-size:14px;">关键时刻,第一时间送达!</span></p>
<p style="margin-left:0em;min-height:1em;font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;color:rgb(62,62,62);font-size:16px;text-align:center;letter-spacing:1px;line-height:1.75em;"><span style="font-size:14px;color:rgb(0,82,255);"></span></p>
<p style="min-height:1em;color:rgb(51,51,51);font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;font-size:17px;letter-spacing:.544px;line-height:27.2px;text-align:center;"><img alt="640?wx_fmt&#61;jpeg" src="https://beijingoptbbs.oss-cn-beijing.aliyuncs.com/cs/5606289-693862cdb6222dfca0cfa362e108215e"></p>
<p style="min-height:1em;color:rgb(51,51,51);font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;font-size:17px;letter-spacing:.544px;line-height:27.2px;text-align:justify;"><span style="font-family:&#39;Optima-Regular&#39;, &#39;PingFangTC-light&#39;;letter-spacing:.5px;color:rgb(136,136,136);font-size:14px;">作者:xiaoyu</span></p>
<p style="min-height:1em;color:rgb(51,51,51);font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;font-size:17px;letter-spacing:.544px;line-height:27.2px;text-align:justify;"><span style="font-family:&#39;Optima-Regular&#39;, &#39;PingFangTC-light&#39;;letter-spacing:.5px;color:rgb(136,136,136);font-size:14px;">知乎:<span style="text-align:center;">https://zhuanlan.zhihu.com/pypcfx</span></span></p>
<p style="min-height:1em;color:rgb(51,51,51);font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;font-size:17px;letter-spacing:.544px;line-height:27.2px;text-align:justify;"><span style="color:rgb(136,136,136);font-size:14px;">介绍:一个半路转行的数据挖掘工程师</span></p>
<p style="min-height:1em;color:rgb(51,51,51);font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;font-size:17px;letter-spacing:.544px;line-height:27.2px;text-align:justify;"><br></p>
<h2 style="color:rgb(51,51,51);font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;letter-spacing:.544px;text-align:justify;"><span style="line-height:1.5em;font-size:18px;"><strong><span style="line-height:1.5em;"><span style="color:rgb(254,116,21);">▍</span><span style="color:rgb(54,54,54);">前言</span></span></strong></span></h2>
<p style="min-height:1em;color:rgb(51,51,51);font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;font-size:17px;letter-spacing:.544px;line-height:27.2px;text-align:justify;"><span style="line-height:1.5em;font-size:18px;"><strong><span style="line-height:1.5em;color:rgb(54,54,54);"><br></span></strong></span></p>
<p style="min-height:1em;color:rgb(51,51,51);font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;font-size:17px;letter-spacing:.544px;line-height:27.2px;text-align:justify;"><span style="letter-spacing:1px;color:rgb(54,54,54);line-height:1.5em;font-size:15px;">逻辑回归是一个非常经典,也是很常用的模型。之前和大家分享过它的重要性:<a href="http://mp.weixin.qq.com/s?__biz&#61;MzUzODYwMDAzNA&#61;&#61;&amp;mid&#61;2247484850&amp;idx&#61;1&amp;sn&#61;235d12dba4a45cb36ef0ceda2c79e3e7&amp;chksm&#61;fad472bfcda3fba970420c8d186255cd3c90b79ae478f261648eb5e44fbc412e2f527588be30&amp;scene&#61;21#wechat_redirect" style="color:rgb(87,107,149);">5个原因告诉你:为什么在成为数据科学家之前,“逻辑回归”是第一个需要学习的</a></span></p>
<p style="min-height:1em;color:rgb(51,51,51);font-family:&#39;-apple-system-font&#39;, BlinkMacSystemFont, &#39;Helvetica Neue&#39;, &#39;PingFang SC&#39;, &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei UI&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif;font-size:17px;letter-spacing:.544px;lin
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