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Ensemble

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This commit is contained in:
Joseph Redmon
2013-12-07 09:38:50 -08:00
parent 4bdf96bd6a
commit 8c3694bc91
8 changed files with 109 additions and 33 deletions
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48
src/network.c
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@ -174,18 +174,18 @@ int train_network_datum(network net, double *x, double *y, double step, double m
return (y[class]?1:0);
}
double train_network_sgd(network net, data d, double step, double momentum,double decay)
double train_network_sgd(network net, data d, int n, double step, double momentum,double decay)
{
int i;
int correct = 0;
for(i = 0; i < d.X.rows; ++i){
for(i = 0; i < n; ++i){
int index = rand()%d.X.rows;
correct += train_network_datum(net, d.X.vals[index], d.y.vals[index], step, momentum, decay);
if((i+1)%10 == 0){
printf("%d: %f\n", (i+1), (double)correct/(i+1));
}
//if((i+1)%10 == 0){
// printf("%d: %f\n", (i+1), (double)correct/(i+1));
//}
}
return (double)correct/d.X.rows;
return (double)correct/n;
}
void train_network(network net, data d, double step, double momentum, double decay)
@ -269,6 +269,27 @@ void visualize_network(network net)
}
}
double *network_predict(network net, double *input)
{
forward_network(net, input);
double *out = get_network_output(net);
return out;
}
matrix network_predict_data(network net, data test)
{
int i,j;
int k = get_network_output_size(net);
matrix pred = make_matrix(test.X.rows, k);
for(i = 0; i < test.X.rows; ++i){
double *out = network_predict(net, test.X.vals[i]);
for(j = 0; j < k; ++j){
pred.vals[i][j] = out[j];
}
}
return pred;
}
void print_network(network net)
{
int i,j;
@ -306,17 +327,12 @@ void print_network(network net)
fprintf(stderr, "\n");
}
}
double network_accuracy(network net, data d)
{
int i;
int correct = 0;
int k = get_network_output_size(net);
for(i = 0; i < d.X.rows; ++i){
forward_network(net, d.X.vals[i]);
double *out = get_network_output(net);
int guess = max_index(out, k);
if(d.y.vals[i][guess]) ++correct;
}
return (double)correct/d.X.rows;
matrix guess = network_predict_data(net, d);
double acc = matrix_accuracy(d.y, guess);
free_matrix(guess);
return acc;
}