I tried Kohonen for classifying timbres once and though I'm certainly not an expert on it Ben I seem to remember that it works within a threshold value. Input vector is just a _point_ in an n-dim space with a "sphere of influence" around it. If an output vector is within this threshold area then the more input stimulus you present that match a vector falling inside the threshold the more that output is weighted. Eventually that output vector will fire with probability= 1 (absolutely certain). Further input vectors, no matter how many you give, won't affect output vectors outside the threshold. It's a long time ago, so excuse me if I'm talking rubbish.
On Fri, 12 Oct 2007 11:27:15 -0700 "B. Bogart" <[EMAIL PROTECTED]> wrote: > Hey all, Johannes in particular, > > According to Medler: > http://neuron-ai.tuke.sk/NCS/VOL1/P3_html/node28.html#SECTION00045000000000000000 > > "...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.) > > > Thanks, > B. > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list -- Use the source _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
