⭐ 欢迎来到虫虫下载站！ | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站
📤 上传资源

📄 cerror.html

📁 用matlab实现的统计模式识别工具箱
💻 HTML
字号:
🔍 
<html><head>  <meta HTTP-EQUIV="Content-Type" CONTENT="text/html;charset=ISO-8859-1">  <title>Contents.m</title><link rel="stylesheet" type="text/css" href="../stpr.css"></head><body><table  border=0 width="100%" cellpadding=0 cellspacing=0><tr valign="baseline"><td valign="baseline" class="function"><b class="function">CERROR</b><td valign="baseline" align="right" class="function"><a href="../misc/index.html" target="mdsdir"><img border = 0 src="../up.gif"></a></table>  <p><b>Computes classification error.</b></p>  <hr><div class='code'><code><span class=help></span><br><span class=help>&nbsp;<span class=help_field>Synopsis:</span></span><br><span class=help>&nbsp;&nbsp;error&nbsp;=&nbsp;cerror(y1,y2)</span><br><span class=help>&nbsp;&nbsp;error&nbsp;=&nbsp;cerror(y1,y2,label)&nbsp;</span><br><span class=help></span><br><span class=help>&nbsp;<span class=help_field>Description:</span></span><br><span class=help>&nbsp;&nbsp;error&nbsp;=&nbsp;cerror(y1,y2)&nbsp;returns&nbsp;classification&nbsp;error,&nbsp;i.e.,</span><br><span class=help>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;error=&nbsp;&nbsp;1/length(y1)&nbsp;sum_i&nbsp;L(&nbsp;y1(i),&nbsp;y2(i))</span><br><span class=help></span><br><span class=help>&nbsp;&nbsp;&nbsp;&nbsp;where&nbsp;L(a,b)=0&nbsp;if&nbsp;a==b&nbsp;and&nbsp;L(a,b)=1&nbsp;if&nbsp;a&nbsp;~=&nbsp;b.</span><br><span class=help></span><br><span class=help>&nbsp;&nbsp;error&nbsp;=&nbsp;cerror(y1,y2,label)&nbsp;considers&nbsp;only&nbsp;labels</span><br><span class=help>&nbsp;&nbsp;&nbsp;&nbsp;find(y2==label),&nbsp;i.e.,&nbsp;if&nbsp;y1,y2&nbsp;from&nbsp;{-1,1}&nbsp;then</span><br><span class=help></span><br><span class=help>&nbsp;&nbsp;&nbsp;false_positives_rate&nbsp;=&nbsp;cerror(y1,y2,-1)</span><br><span class=help>&nbsp;&nbsp;&nbsp;false_negatives_rate&nbsp;=&nbsp;cerror(y1,y2,+1)</span><br><span class=help></span><br><span class=help>&nbsp;<span class=help_field>Input:</span></span><br><span class=help>&nbsp;&nbsp;y1&nbsp;[1&nbsp;x&nbsp;n]&nbsp;Vector&nbsp;of&nbsp;integers&nbsp;(response&nbsp;of&nbsp;classifier).</span><br><span class=help>&nbsp;&nbsp;y2&nbsp;[1&nbsp;x&nbsp;n]&nbsp;Vector&nbsp;of&nbsp;integers&nbsp;(ground&nbsp;truth).</span><br><span class=help>&nbsp;&nbsp;label&nbsp;[int]&nbsp;Selected&nbsp;label.</span><br><span class=help></span><br><span class=help>&nbsp;<span class=help_field>Output:</span></span><br><span class=help>&nbsp;&nbsp;error&nbsp;[real]&nbsp;Error.&nbsp;</span><br><span class=help></span><br><span class=help>&nbsp;<span class=help_field>Example:</span></span><br><span class=help>&nbsp;&nbsp;classifier&nbsp;&nbsp;=&nbsp;[+1,+1,+1,-1]</span><br><span class=help>&nbsp;&nbsp;groundtruth&nbsp;=&nbsp;[-1,+1,-1,+1]</span><br><span class=help>&nbsp;&nbsp;error&nbsp;=&nbsp;cerror(classifier,groundtruth)</span><br><span class=help>&nbsp;&nbsp;false_pos&nbsp;=&nbsp;cerror(classifier,groundtruth,-1)</span><br><span class=help>&nbsp;&nbsp;false_neg&nbsp;=&nbsp;cerror(classifier,groundtruth,1)</span><br><span class=help></span><br><span class=help>&nbsp;<span class=also_field>See also </span><span class=also></span><br><span class=help><span class=also>&nbsp;&nbsp;<a href = "../misc/roc.html" target="mdsbody">ROC</a></span><br><span class=help><span class=also></span><br></code></div>  <hr>  <b>Source:</b> <a href= "../misc/list/cerror.html">cerror.m</a>  <p><b class="info_field">About: </b>  Statistical Pattern Recognition Toolbox<br> (C) 1999-2003, Written by Vojtech Franc and Vaclav Hlavac<br> <a href="http://www.cvut.cz">Czech Technical University Prague</a><br> <a href="http://www.feld.cvut.cz">Faculty of Electrical Engineering</a><br> <a href="http://cmp.felk.cvut.cz">Center for Machine Perception</a><br>  <p><b class="info_field">Modifications: </b> <br> 09-jun-2004, VF<br> 14-Jan-2003, VF<br></body></html>

⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -