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<html><head><title>Netlab Reference Manual som</title></head><body><H1> som</H1><h2>Purpose</h2>Creates a Self-Organising Map.<p><h2>Synopsis</h2><PRE>net = som(nin, map_size)</PRE><p><h2>Description</h2><CODE>net = som(nin, map_size)</CODE> creates a SOM <CODE>net</CODE>with input dimension (i.e. data dimension) <CODE>nin</CODE> and map dimensions<CODE>map_size</CODE>. Only two-dimensional maps are currently implemented.<p>The fields in <CODE>net</CODE> are<PRE> type = 'som' nin = number of inputs map_dim = dimension of map (constrained to be 2) map_size = grid size: number of nodes in each dimension num_nodes = number of nodes: the product of values in map_size map = map_dim+1 dimensional array containing nodes inode_dist = map of inter-node distances using Manhatten metric</PRE><p>The map contains the node vectors arranged column-wise in the firstdimension of the array.<p><h2>See Also</h2><CODE><a href="kmeans.htm">kmeans</a></CODE>, <CODE><a href="somfwd.htm">somfwd</a></CODE>, <CODE><a href="somtrain.htm">somtrain</a></CODE><hr><b>Pages:</b><a href="index.htm">Index</a><hr><p>Copyright (c) Ian T Nabney (1996-9)</body></html>⌨️ 快捷键说明
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