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<html><head>  <meta HTTP-EQUIV="Content-Type" CONTENT="text/html;charset=ISO-8859-1">  <title>kernelproj.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>out_data</span>=<span class=defun_name>kernelproj</span>(<span class=defun_in>in_data,&nbsp;model</span>)
<br><span class=h1>%&nbsp;KERNELPROJ&nbsp;Kernel&nbsp;projection.
</span><br><span class=help>%
</span><br><span class=help>%&nbsp;<span class=help_field>Synopsis:</span></span><br><span class=help>%&nbsp;&nbsp;Y&nbsp;=&nbsp;kernelproj(X,&nbsp;model)
</span><br><span class=help>%&nbsp;&nbsp;out_data&nbsp;=&nbsp;kernelproj(in_data,&nbsp;model)
</span><br><span class=help>%
</span><br><span class=help>%&nbsp;<span class=help_field>Description:</span></span><br><span class=help>%&nbsp;&nbsp;Y&nbsp;=&nbsp;kernelproj(X,&nbsp;model)&nbsp;this&nbsp;function&nbsp;maps&nbsp;input&nbsp;vectors&nbsp;
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;X&nbsp;[dim&nbsp;x&nbsp;num_data]&nbsp;onto&nbsp;vectors&nbsp;Y&nbsp;[new_dim&nbsp;x&nbsp;num_data]
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;using&nbsp;the&nbsp;kernel&nbsp;projection
</span><br><span class=help>%
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Y(:,i)&nbsp;=&nbsp;Alpha'&nbsp;*&nbsp;kernel(sv.X,&nbsp;X(:,i),&nbsp;ker,&nbsp;arg)&nbsp;+&nbsp;b
</span><br><span class=help>%
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;where&nbsp;parameters&nbsp;of&nbsp;the&nbsp;projection&nbsp;are&nbsp;given&nbsp;in&nbsp;model:
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.Alpha&nbsp;[nsv&nbsp;x&nbsp;new_dim]&nbsp;Multipliers.
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.b&nbsp;[new_dim&nbsp;x&nbsp;1]&nbsp;Bias.
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.sv.X&nbsp;[dim&nbsp;x&nbsp;nsv]&nbsp;Vectors.
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.options.ker&nbsp;[string]&nbsp;Kernel&nbsp;identifier.
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.options.arg&nbsp;[1&nbsp;x&nbsp;narg]&nbsp;Kernel&nbsp;argument.
</span><br><span class=help>%
</span><br><span class=help>%&nbsp;&nbsp;out_data&nbsp;=&nbsp;kernelproj(in_data,&nbsp;model)&nbsp;assumes&nbsp;that&nbsp;in_data
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;is&nbsp;a&nbsp;structure&nbsp;containing&nbsp;vectors&nbsp;X&nbsp;and&nbsp;labels&nbsp;y.&nbsp;
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;The&nbsp;output&nbsp;structute&nbsp;out_data&nbsp;is&nbsp;constructed&nbsp;as&nbsp;
</span><br><span class=help>%
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;out_data.X&nbsp;=&nbsp;kernelproj(in_data.X,&nbsp;model)
</span><br><span class=help>%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;out_data.y&nbsp;=&nbsp;in_data.y
</span><br><span class=help>%
</span><br><span class=help>%&nbsp;<span class=help_field>Example:</span></span><br><span class=help>%&nbsp;&nbsp;help&nbsp;kpca;
</span><br><span class=help>%&nbsp;&nbsp;help&nbsp;gda;
</span><br><span class=help>%
</span><br><span class=help>%&nbsp;See&nbsp;also&nbsp;
</span><br><span class=help>%&nbsp;&nbsp;GDA,&nbsp;KPCA,&nbsp;LINPROJ,&nbsp;KERNEL.
</span><br><span class=help>%
</span><br><hr><br><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;19-sep-2004,&nbsp;VF,&nbsp;core&nbsp;of&nbsp;the&nbsp;function&nbsp;rewritten&nbsp;to&nbsp;C
</span><br><span class=help1>%&nbsp;14-may-2004,&nbsp;VF
</span><br><span class=help1>%&nbsp;4-may-2004,&nbsp;VF
</span><br><br><hr><span class=keyword>if</span>&nbsp;isstruct(in_data)==1,
<br>&nbsp;&nbsp;out_data&nbsp;=&nbsp;in_data;
<br>
<br>&nbsp;&nbsp;<span class=keyword>if</span>&nbsp;~isempty(model.Alpha)&nbsp;&&nbsp;isfield(model,&nbsp;<span class=quotes>'Alpha'</span>),
<br>&nbsp;&nbsp;&nbsp;&nbsp;out_data.X&nbsp;=&nbsp;kernelproj_mex(in_data.X,&nbsp;model.Alpha,&nbsp;model.b,&nbsp;...
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;model.sv.X,&nbsp;model.options.ker,&nbsp;model.options.arg);
<br>&nbsp;&nbsp;<span class=keyword>else</span>
<br>&nbsp;&nbsp;&nbsp;&nbsp;[dim,num_data]=size(in_data.X);
<br>&nbsp;&nbsp;&nbsp;&nbsp;out_data.X&nbsp;=&nbsp;model.b*ones(1,num_data);
<br>&nbsp;&nbsp;<span class=keyword>end</span>
<br>&nbsp;&nbsp;
<br><span class=keyword>else</span>
<br>&nbsp;&nbsp;<span class=keyword>if</span>&nbsp;~isempty(model.Alpha)&nbsp;&&nbsp;isfield(model,<span class=quotes>'Alpha'</span>),
<br>&nbsp;&nbsp;&nbsp;&nbsp;
<br>&nbsp;&nbsp;&nbsp;&nbsp;out_data&nbsp;=&nbsp;kernelproj_mex(in_data,&nbsp;model.Alpha,&nbsp;model.b,&nbsp;...
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;model.sv.X,&nbsp;model.options.ker,&nbsp;model.options.arg);
<br>&nbsp;&nbsp;<span class=keyword>else</span>
<br>&nbsp;&nbsp;&nbsp;&nbsp;[dim,num_data]=size(in_data);
<br>&nbsp;&nbsp;&nbsp;&nbsp;out_data&nbsp;=&nbsp;model.b*ones(1,num_data);
<br>&nbsp;&nbsp;<span class=keyword>end</span>
<br><span class=keyword>end</span>
<br>
<br><span class=jump>return</span>;
<br><span class=comment>%&nbsp;EOF</span><br></code>

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