The operation smooths a given data according to the structure of the SOM. Data records corresponding to neurons are averaged by the values in their neighbors. If hitcounts has been given, then only empty neurons are recomputed; otherwise updating is performed for all the neurons.
Example (ex5.3): This example shows the effect of the smoothing.
... NDA> somtr -d pre -sout som -l 5 NDA> somcl -d pre -s som -cout cld 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 ...
Original Smoothed