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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"><html><head><title>SOM Toolbox / som_distortion3 </title></head><body bgcolor=#f0f0f0><table border=0 width="100%" cellpadding=0 cellspacing=0><tr><td valign=baseline><font size=+2>SOM Toolbox</font></td><td valign=baseline align=center><a href="somtoolbox.html">Online documentation</td><td valign=baseline align=right><a href="http://www.cis.hut.fi/projects/somtoolbox/" target="_top">http://www.cis.hut.fi/projects/somtoolbox/</a></td></tr></table><hr><H1> som_distortion3 </H1><P><B> [Err,sPropTotal,sPropMunits,sPropComps] = som_distortion3(sM,D,rad)</B></P><PRE>SOM_DISTORTION3 Map distortion measures. [sE,Err] = som_distortion3(sM,[D],[rad]); sE = som_distortion3(sM); Input and output arguments ([]'s are optional): sM (struct) map struct [D] (matrix) a matrix, size dlen x dim (struct) data or map struct by default the map struct is used [rad] (scalar) neighborhood radius, looked from sM.trainhist by default, or = 1 if that has no valid values Err (matrix) size munits x dim x 3 distortion error elements (quantization error, neighborhood bias, and neighborhood variance) for each map unit and component sPropTotal (struct) .n = length of data .h = mean neighborhood function value .err = errors sPropMunits (struct) .Ni = hits per map unit .Hi = sum of neighborhood values for each map unit .Err = errors per map unit sPropComps (struct) .e1 = total squared distance to centroid .eq = total squared distance to BMU .Err = errors per component See also SOM_QUALITY.</PRE><p><hr><br><center>[ <a href="somtoolbox.html">SOM Toolbox online doc</a> ]</center><br><!-- Last updated: May 30 2002 --></body></html>⌨️ 快捷键说明
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