From 8c3694bc911bbeab63e75c18f920e0991a5fa877 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Sat, 07 Dec 2013 17:38:50 +0000
Subject: [PATCH] Ensemble
---
src/network.c | 48 ++++++++++++++++++++++++++++++++----------------
1 files changed, 32 insertions(+), 16 deletions(-)
diff --git a/src/network.c b/src/network.c
index 29234da..34cd8b4 100644
--- a/src/network.c
+++ b/src/network.c
@@ -174,18 +174,18 @@
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 @@
}
}
+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 @@
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;
}
--
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