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<html><head>  <meta HTTP-EQUIV="Content-Type" CONTENT="text/html;charset=ISO-8859-1">  <title>demo_svm.m</title><link rel="stylesheet" type="text/css" href="../../m-syntax.css"></head><body><code><span class=defun_kw>function</span>&nbsp;<span class=defun_out>result&nbsp;</span>=&nbsp;<span class=defun_name>demo_svm</span>(<span class=defun_in>action,hfigure,varargin</span>)<br><span class=h1>%&nbsp;DEMO_SVM&nbsp;Demo&nbsp;on&nbsp;Support&nbsp;Vector&nbsp;Machines.</span><br><span class=help>%</span><br><span class=help>%&nbsp;<span class=help_field>Synopsis:</span></span><br><span class=help>%&nbsp;&nbsp;demo_svm</span><br><span class=help>%</span><br><span class=help>%&nbsp;<span class=help_field>Description:</span></span><br><span class=help>%&nbsp;&nbsp;DEMO_SVM&nbsp;demonstrates&nbsp;algorithms&nbsp;training&nbsp;the&nbsp;binary&nbsp;</span><br><span class=help>%&nbsp;&nbsp;&nbsp;SVM&nbsp;classifier&nbsp;L1-soft&nbsp;and&nbsp;L2-soft&nbsp;margin&nbsp;[Vapnik95]</span><br><span class=help>%&nbsp;&nbsp;&nbsp;[Cris00].&nbsp;The&nbsp;input&nbsp;training&nbsp;vectors&nbsp;must&nbsp;be&nbsp;2-dimensional&nbsp;</span><br><span class=help>%&nbsp;&nbsp;&nbsp;and&nbsp;can&nbsp;be&nbsp;interactively&nbsp;created&nbsp;by&nbsp;the&nbsp;user.</span><br><span class=help>%</span><br><span class=help>%&nbsp;&nbsp;Following&nbsp;algorithms&nbsp;can&nbsp;be&nbsp;tested:</span><br><span class=help>%</span><br><span class=help>%&nbsp;&nbsp;-&nbsp;Sequential&nbsp;Minimal&nbsp;Optimizer&nbsp;(SMO)&nbsp;for&nbsp;L1-norm&nbsp;soft&nbsp;margin.</span><br><span class=help>%&nbsp;&nbsp;-&nbsp;QP&nbsp;solver&nbsp;(quadprog)&nbsp;used&nbsp;to&nbsp;train&nbsp;SVM&nbsp;with&nbsp;L2-norm&nbsp;soft&nbsp;margin.</span><br><span class=help>%&nbsp;&nbsp;-&nbsp;Kernel&nbsp;Perceptron&nbsp;for&nbsp;separable&nbsp;hyperplane.</span><br><span class=help>%</span><br><span class=help>%&nbsp;<span class=help_field>Control:</span></span><br><span class=help>%&nbsp;&nbsp;Algorithm&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;algorithm&nbsp;for&nbsp;testing.</span><br><span class=help>%&nbsp;&nbsp;Kernel&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;non-linear&nbsp;kernel.</span><br><span class=help>%&nbsp;&nbsp;Kernel&nbsp;argument&nbsp;-&nbsp;argument&nbsp;of&nbsp;the&nbsp;non-linear&nbsp;kernel.</span><br><span class=help>%&nbsp;&nbsp;C-constant&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;trade-off&nbsp;(regularization)&nbsp;constant.</span><br><span class=help>%&nbsp;&nbsp;parameters&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;parameters&nbsp;of&nbsp;the&nbsp;selected&nbsp;algorithm.</span><br><span class=help>%&nbsp;&nbsp;background&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;if&nbsp;selected&nbsp;then&nbsp;the&nbsp;background&nbsp;color</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;denotes&nbsp;the&nbsp;sign&nbsp;and&nbsp;the&nbsp;intenzity&nbsp;denotes&nbsp;the&nbsp;value&nbsp;</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of&nbsp;the&nbsp;found&nbsp;decision&nbsp;function.</span><br><span class=help>%</span><br><span class=help>%&nbsp;&nbsp;FIG2EPS&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;exports&nbsp;screen&nbsp;to&nbsp;the&nbsp;PostScript&nbsp;file.</span><br><span class=help>%&nbsp;&nbsp;Load&nbsp;data&nbsp;&nbsp;&nbsp;-&nbsp;loads&nbsp;input&nbsp;training&nbsp;sets&nbsp;from&nbsp;file.</span><br><span class=help>%&nbsp;&nbsp;Create&nbsp;data&nbsp;-&nbsp;calls&nbsp;program&nbsp;for&nbsp;creating&nbsp;point&nbsp;sets.</span><br><span class=help>%&nbsp;&nbsp;Reset&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;clears&nbsp;the&nbsp;screen.</span><br><span class=help>%&nbsp;&nbsp;Train&nbsp;SVM&nbsp;&nbsp;&nbsp;-&nbsp;trains&nbsp;and&nbsp;displays&nbsp;the&nbsp;SVM&nbsp;classifer.</span><br><span class=help>%&nbsp;&nbsp;Info&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;calls&nbsp;the&nbsp;info&nbsp;box.</span><br><span class=help>%&nbsp;&nbsp;Close&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;close&nbsp;the&nbsp;program.</span><br><span class=help>%</span><br><span class=help>%&nbsp;See&nbsp;also&nbsp;</span><br><span class=help>%&nbsp;&nbsp;SMO,&nbsp;SVMQUADPROG,&nbsp;KPERCEPTR.</span><br><span class=help>%</span><br><hr><span class=help1>%&nbsp;<span class=help1_field>About:</span>&nbsp;Statistical&nbsp;Pattern&nbsp;Recognition&nbsp;Toolbox</span><br><span class=help1>%&nbsp;(C)&nbsp;1999-2003,&nbsp;Written&nbsp;by&nbsp;Vojtech&nbsp;Franc&nbsp;and&nbsp;Vaclav&nbsp;Hlavac</span><br><span class=help1>%&nbsp;&lt;a&nbsp;href="http://www.cvut.cz"&gt;Czech&nbsp;Technical&nbsp;University&nbsp;Prague&lt;/a&gt;</span><br><span class=help1>%&nbsp;&lt;a&nbsp;href="http://www.feld.cvut.cz"&gt;Faculty&nbsp;of&nbsp;Electrical&nbsp;Engineering&lt;/a&gt;</span><br><span class=help1>%&nbsp;&lt;a&nbsp;href="http://cmp.felk.cvut.cz"&gt;Center&nbsp;for&nbsp;Machine&nbsp;Perception&lt;/a&gt;</span><br><br><span class=help1>%&nbsp;<span class=help1_field>Modifications:</span></span><br><span class=help1>%&nbsp;2-june-2004,&nbsp;VF</span><br><span class=help1>%&nbsp;18-July-2003,&nbsp;VF</span><br><span class=help1>%&nbsp;6-march-2002,&nbsp;V.Franc</span><br><span class=help1>%&nbsp;23-oct-2001,&nbsp;V.Franc</span><br><br><hr>BORDER=0.2;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=comment>%&nbsp;minimal&nbsp;space&nbsp;between&nbsp;axis&nbsp;and&nbsp;points</span><br>DATA_IDENT=<span class=quotes>'Finite&nbsp;sets,&nbsp;Enumeration'</span>;&nbsp;&nbsp;<span class=comment>%&nbsp;file&nbsp;identifier</span><br>ALGOS=[<span class=quotes>'SMO&nbsp;(L1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'</span>;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'QUADPROG&nbsp;(L2)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'</span>;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Kernel-Perceptron&nbsp;'</span>];<br>KERNELS=[<span class=quotes>'Linear&nbsp;&nbsp;&nbsp;&nbsp;'</span>;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Polynomial'</span>;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'RBF&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'</span>];<br><br>SMO_PARAM&nbsp;=&nbsp;<span class=quotes>'epsilon,tolerance'</span>;<br>DEF_SMO_PARAM&nbsp;=&nbsp;<span class=quotes>'1e-3,1e-3'</span>;<br>KERNELSK_PARAM&nbsp;=&nbsp;<span class=quotes>'epsilon,iter_limit'</span>;<br>DEF_KERNELSK_PARAM&nbsp;=&nbsp;<span class=quotes>'1e-3,inf'</span>;<br>KPERCEPTR_PARAM&nbsp;=&nbsp;<span class=quotes>'tmax'</span>;<br>DEF_KPERCEPTR_PARAM&nbsp;=&nbsp;<span class=quotes>'inf'</span>;<br><br><span class=comment>%&nbsp;if&nbsp;number&nbsp;of&nbsp;arguments&nbsp;is&nbsp;less&nbsp;then&nbsp;1,&nbsp;that&nbsp;means&nbsp;first&nbsp;call&nbsp;of&nbsp;this</span><br><span class=comment>%&nbsp;function.&nbsp;Every&nbsp;other&nbsp;calls&nbsp;set&nbsp;up&nbsp;at&nbsp;least&nbsp;argument&nbsp;action</span><br><span class=keyword>if</span>&nbsp;<span class=stack>nargin</span>&nbsp;&lt;&nbsp;1,<br>&nbsp;&nbsp;&nbsp;action&nbsp;=&nbsp;<span class=quotes>'initialize'</span>;<br><span class=keyword>end</span><br><br><span class=comment>%&nbsp;what&nbsp;action&nbsp;is&nbsp;required&nbsp;?</span><br><span class=keyword>switch</span>&nbsp;lower(action)<br><br><span class=label>case</span>&nbsp;<span class=quotes>'initialize'</span><br>&nbsp;&nbsp;&nbsp;<span class=comment>%&nbsp;==&nbsp;Initialize&nbsp;user&nbsp;interface&nbsp;control&nbsp;and&nbsp;figure&nbsp;=======</span><br><br>&nbsp;&nbsp;&nbsp;<span class=comment>%&nbsp;==&nbsp;Figure&nbsp;=============================================</span><br>&nbsp;&nbsp;&nbsp;left=0.1;<br>&nbsp;&nbsp;&nbsp;width=0.8;<br>&nbsp;&nbsp;&nbsp;bottom=0.1;<br>&nbsp;&nbsp;&nbsp;height=0.8;<br>&nbsp;&nbsp;&nbsp;hfigure=<span class=graph>figure</span>(<span class=quotes>'Name'</span>,<span class=quotes>'Support&nbsp;Vector&nbsp;Machines'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Visible'</span>,<span class=quotes>'off'</span>,...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'NumberTitle'</span>,<span class=quotes>'off'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Units'</span>,<span class=quotes>'normalized'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Position'</span>,[left&nbsp;bottom&nbsp;width&nbsp;height],...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Units'</span>,<span class=quotes>'normalized'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'tag'</span>,<span class=quotes>'demo_svm'</span>);<br><br>&nbsp;&nbsp;&nbsp;<span class=comment>%&nbsp;==&nbsp;Axes&nbsp;=========================================</span><br>&nbsp;&nbsp;&nbsp;left=0.1;<br>&nbsp;&nbsp;&nbsp;width=0.65;<br>&nbsp;&nbsp;&nbsp;bottom=0.35;<br>&nbsp;&nbsp;&nbsp;height=0.60;<br>&nbsp;&nbsp;&nbsp;haxes=<span class=graph>axes</span>(...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Units'</span>,<span class=quotes>'normalized'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'UserData'</span>,[],...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Position'</span>,[left&nbsp;bottom&nbsp;width&nbsp;height]);<br>&nbsp;&nbsp;&nbsp;xlabel(<span class=quotes>'feature&nbsp;x'</span>);<br>&nbsp;&nbsp;&nbsp;ylabel(<span class=quotes>'feature&nbsp;y'</span>);<br><br>&nbsp;&nbsp;&nbsp;<span class=comment>%&nbsp;==&nbsp;Comment&nbsp;window&nbsp;=================================</span><br>&nbsp;&nbsp;&nbsp;<span class=comment>%&nbsp;Comment&nbsp;Window&nbsp;frame</span><br>&nbsp;&nbsp;&nbsp;bottom=0.05;<br>&nbsp;&nbsp;&nbsp;height=0.2;<br>&nbsp;&nbsp;&nbsp;<span class=graph>uicontrol</span>(&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Style'</span>,<span class=quotes>'frame'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Units'</span>,<span class=quotes>'normalized'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Position'</span>,[left&nbsp;bottom&nbsp;width&nbsp;height],&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'BackgroundColor'</span>,[0.5&nbsp;0.5&nbsp;0.5]);<br><br>&nbsp;&nbsp;&nbsp;<span class=comment>%&nbsp;Text&nbsp;label</span><br>&nbsp;&nbsp;&nbsp;<span class=graph>uicontrol</span>(&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Style'</span>,<span class=quotes>'text'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Units'</span>,<span class=quotes>'normalized'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Position'</span>,[left&nbsp;height-0.01&nbsp;width&nbsp;0.05],&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'BackgroundColor'</span>,[0.5&nbsp;0.5&nbsp;0.5],&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'ForegroundColor'</span>,[1&nbsp;1&nbsp;1],&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'String'</span>,<span class=quotes>'Comment&nbsp;Window'</span>);<br><br>&nbsp;&nbsp;&nbsp;<span class=comment>%&nbsp;Edit&nbsp;window</span><br>&nbsp;&nbsp;&nbsp;border=0.01;<br>&nbsp;&nbsp;&nbsp;hconsole=<span class=graph>uicontrol</span>(&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Style'</span>,<span class=quotes>'edit'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'HorizontalAlignment'</span>,<span class=quotes>'left'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Units'</span>,<span class=quotes>'normalized'</span>,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Max'</span>,10,&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'BackgroundColor'</span>,[1&nbsp;1&nbsp;1],&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Position'</span>,[left+border&nbsp;bottom&nbsp;width-2*border&nbsp;height-0.05],&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'Enable'</span>,<span class=quotes>'inactive'</span>,...<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=quotes>'String'</span>,<span class=quotes>''</span>);<br><br><br>&nbsp;&nbsp;&nbsp;<span class=comment>%&nbsp;==&nbsp;Buttons&nbsp;===========================================</span><br>
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