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Smoothing data in a TS-SOM

 

smhsom Smooth data vectors in neurons
-s <som> name of the TS-SOM structure
-d <data> data to be smoothed
-dout <dataout> name of the resulting data
[-hits <hitfield>] field including hitcounts for clusters
[-max <maxit>] maximum number of iter. (default 50)

This operation smooths a given data according to the structure of a SOM. Data records corresponding to neurons are averaged by the values of their neighbors. If <hitfield> has been specified, then only empty neurons are recomputed; otherwise updating is performed for all the neurons.

Example (ex5.3): This example shows the effect of smoothing.

...
NDA> somtr -d pre -sout som -cout cld -l 5
NDA> clstat -d boston -c cld -dout sta -all
NDA> smhsom -s som -d sta -dout smosta -hits sta.hits -max 20
NDA> mkgrp grp1 -s som
NDA> setgdat grp1 -d sta
NDA> layer grp1 -l 4
NDA> bar grp1 -f sta.crim_avg -co red -sca som
NDA> bar grp1 -f sta.chas_avg -co blue -sca som
NDA> mkgrp grp2 -s som
NDA> setgdat grp2 -d smosta
NDA> layer grp2 -l 4
NDA> bar grp2 -f smosta.crim_avg -co red -sca som
NDA> bar grp2 -f smosta.chas_avg -co blue -sca som

figure1993

Original Smoothed



Anssi Lensu
Wed Oct 6 12:57:48 EET DST 1999