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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"><html><head><title>SOM Toolbox / som_lininit </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_lininit </H1><H3> Purpose </H3><PRE> Initializes a SOM linearly along its greatest eigenvectors.</PRE><H3> Syntax </H3><UL><PRE> sMap = som_lininit(D); sMap = som_lininit(D,sMap); sMap = som_lininit(D,'munits',100,'hexa');</PRE></UL><H3> Description </H3><PRE> Initializes a SOM linearly. If necessary, a map struct is created first. The initialization is made by first calculating the eigenvalues and eigenvectors of the training data. Then, the map is initialized along the mdim greatest eigenvectors of the training data, where mdim is the dimension of the map grid.</PRE><H3> References </H3><PRE> Kohonen, T., "Self-Organizing Map", 2nd ed., Springer-Verlag, Berlin, 1995, pp. 106-107.</PRE><H3> Required input arguments </H3><PRE> D The training data. (struct) Data struct. If this is given, its '.comp_names' and '.comp_norm' fields are copied to the map struct. (matrix) data matrix, size dlen x dim</PRE><H3> Optional input arguments </H3><PRE> argID (string) Argument identifier string (see below). value (varies) Value for the argument (see below). The optional arguments can be given as 'argID',value -pairs. If an argument is given value multiple times, the last one is used. Here are the valid argument IDs and corresponding values. The values which are unambiguous (marked with '*') can be given without the preceeding argID. 'dlen' (scalar) length of the training data 'data' (matrix) the training data *(struct) the training data 'munits' (scalar) number of map units 'msize' (vector) map size 'lattice' *(string) map lattice: 'hexa' or 'rect' 'shape' *(string) map shape: 'sheet', 'cyl' or 'toroid' 'topol' *(struct) topology struct 'som_topol','sTopol' = 'topol' 'map' *(struct) map struct 'som_map','sMap' = 'map'</PRE><H3> Output arguments </H3><PRE> sMap (struct) The initialized map struct.</PRE><H3> Examples </H3><PRE> sMap = som_lininit(D); sMap = som_lininit(D,sMap); sMap = som_lininit(D,'msize',[10 10]); sMap = som_lininit(D,'munits',100,'rect');</PRE><H3> See also </H3><TABLE NOBORDER WIDTH=80%><TR><TD><a href="som_map_struct.html"><B>som_map_struct</B></a><TD> Create a map struct.<TR><TD><a href="som_randinit.html"><B>som_randinit</B></a><TD> Initialize a map with random values.<TR><TD><a href="som_make.html"><B>som_make</B></a><TD> Initialize and train self-organizing map.</TABLE><p><hr><br><br><!-- Last updated: May 30 2002 --></body></html>⌨️ 快捷键说明
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