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rogueviz::kohonen:: improved step debug, changed tt calculation
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@ -639,7 +639,7 @@ void step() {
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initialize_dispersion();
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initialize_neurons_initial();
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double tt = (t-1.) / tmax;
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double tt = (t-.5) / tmax;
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tt = pow(tt, ttpower);
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double sigma = maxdist * tt;
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@ -648,14 +648,13 @@ void step() {
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if(qpct) {
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int pct = (int) ((qpct * (t+.0)) / tmax);
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if(pct != lpct) {
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printf("pct %d lpct %d\n", pct, lpct);
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lpct = pct;
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analyze();
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if(gaussian)
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printf("t = %6d/%6d %3d%% sigma=%10.7lf maxudist=%10.7lf\n", t, tmax, pct, sigma, maxudist);
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println(hlog, format("t = %6d/%6d %3d%% sigma=%10.7lf maxudist=%10.7lf\n", t, tmax, pct, sigma, maxudist));
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else
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printf("t = %6d/%6d %3d%% dispid=%5d maxudist=%10.7lf\n", t, tmax, pct, dispid, maxudist);
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println(hlog, format("t = %6d/%6d %3d%% dispid=%5d maxudist=%10.7lf\n", t, tmax, pct, dispid, maxudist));
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}
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}
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int id = hrand(samples);
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@ -686,13 +685,19 @@ void step() {
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if(!n2) continue;
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double nu = learning_factor;
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if(gaussian)
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if(gaussian) {
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nu *= exp(-sqr(sd.dist/sigma));
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if(isnan(nu))
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throw hr_exception(lalign(0, "obtained nan, ", sd.dist, " / ", sigma));
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}
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else
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nu *= *(it++);
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for(int k=0; k<columns; k++)
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for(int k=0; k<columns; k++) {
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n2->net[k] += nu * (data[id].val[k] - n2->net[k]);
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if(isnan(n2->net[k]))
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throw hr_exception("obtained nan somehow, nu = " + lalign(0, nu));
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}
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}
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t--;
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