[PD] SOM experts...
bbogart at goto10.org
Fri Oct 12 20:27:15 CEST 2007
Hey all, Johannes in particular,
According to Medler:
"...Consequently, more frequently occurring stimuli will be represented
by larger areas in the map than infrequently occurring stimuli."
Which leads me to believe if you present a SOM with the same pattern,
the number of nodes that fire should increase proportional to the
frequency of the pattern.
Problem is I can make ann_som do that, not matter what rules I specify
(using the regular decreasing learning rate).
If I send the same pattern to the som 10000 times, only one node will
fire for that duration.
Am I misinterpreting the text?
Also by default does ann_som using time-seeded random numbers or regular
random numbers? I ask because it appears the same node always wins at
the start... (the biggest number).
Is there a FANN mailinglist for the discussion of such issues?
(http://leenissen.dk/fann/ is timing out for me.)
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