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<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">LIN2QUAD</b><td valign="baseline" align="right" class="function"><a href="../quadrat/index.html" target="mdsdir"><img border = 0 src="../up.gif"></a></table> <p><b>Merges linear rule and quadratic mapping.</b></p> <hr><div class='code'><code><span class=help> </span><br><span class=help> <span class=help_field>Synopsis:</span></span><br><span class=help> quad_model = lin2quad(lin_model)</span><br><span class=help></span><br><span class=help> <span class=help_field>Description:</span></span><br><span class=help> It recomputes parameters of input linear classifier</span><br><span class=help> onto parameters of output quadratic classisifier.</span><br><span class=help> The linear classifier is assumed to be trained on </span><br><span class=help> the n-dimensional data quadraticaly mapped (see 'help qmap') </span><br><span class=help> into the (n*(n+3)/2)-dimensional feature space. The linear </span><br><span class=help> classifier in the feature space appears as the quadratic </span><br><span class=help> classifier in the original data space.</span><br><span class=help></span><br><span class=help> <span class=help_field>Description:</span></span><br><span class=help> orig_data = load('vltava');</span><br><span class=help> map_data = qmap(orig_data);</span><br><span class=help> lin_model = perceptron(map_data);</span><br><span class=help> quad_model = lin2quad(lin_model);</span><br><span class=help> figure; ppatterns(orig_data); </span><br><span class=help> pboundary(quad_model);</span><br><span class=help></span><br><span class=help> <span class=also_field>See also </span><span class=also></span><br><span class=help><span class=also> QUACLASS, <a href = "../quadrat/qmap.html" target="mdsbody">QMAP</a></span><br><span class=help><span class=also></span><br></code></div> <hr> <b>Source:</b> <a href= "../quadrat/list/lin2quad.html">lin2quad.m</a> <p><b class="info_field">Modifications: </b> <br> 09-jun-2004, VF<br> 17-may-2004, VF<br></body></html>?? 快捷鍵說明
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