shithub: util

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ann

--- a/ann.c

+++ b/ann.c

@@ -222,7 +222,7 @@

 	va_start(args, num_layers);

 	ret->n = num_layers;

-	ret->rate = 0.25;

+	ret->rate = 0.7;

 	ret->layers = calloc(num_layers, sizeof(Layer*));

 	ret->weights = calloc(num_layers-1, sizeof(Weights*));

 	ret->deltas = calloc(num_layers-1, sizeof(Weights*));

@@ -251,7 +251,7 @@

 	int i;

 	ret->n = num_layers;

-	ret->rate = 0.25;

+	ret->rate = 0.7;

 	ret->layers = calloc(num_layers, sizeof(Layer*));

 	ret->weights = calloc(num_layers-1, sizeof(Weights*));

 	ret->deltas = calloc(num_layers-1, sizeof(Weights*));

@@ -320,6 +320,12 @@

 		error[o] -= outputs[o];

 		error[o] = -error[o];

 		ret += pow(error[o], 2.0) * 0.5;

+		if (error[o] < -.9999999)

+			error[o] = -17.0;

+		else if (error[o] > .9999999)

+			error[o] = 17.0;

+		else

+			error[o] = log((1.0 + error[o]) / (1.0 - error[o]));

 	}

 	D = ann->deltas[ann->n-2];

 	weightsinitdoubles(D, error);