📄 som_randinit.html

📁 Kohonen的SOM软件包
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"><html><head><title>SOM Toolbox / som_randinit </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_randinit </H1><H3> Purpose </H3><PRE> Initializes a SOM with random values.</PRE><H3> Syntax </H3><UL><PRE>  sMap = som_randinit(D)  sMap = som_randinit(D,sMap);  sMap = som_randinit(D,'munits',100,'hexa');</PRE></UL><H3> Description </H3><PRE> Initializes a SOM with random values. If necessary, a map struct is created first. For each component (xi), the values are uniformly distributed in the range of [min(xi) max(xi)]. </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_randinit(D);  sMap = som_randinit(D,sMap);  sMap = som_randinit(D,sTopol);  sMap = som_randinit(D,'msize',[10 10]);  sMap = som_randinit(D,'munits',100,'hexa');</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_lininit.html"><B>som_lininit</B></a><TD> Initialize a map using linear initialization algorithm.<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>
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