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Fixed typo in learn_platt_scaling(). The method wasn't using the exact prior 

suggested by Platt's paper.
This commit is contained in:
Davis King 2013-06-23 14:58:51 -04:00
parent f74ccbdabc
commit afe67a2bb0
1 changed files with 4 additions and 4 deletions
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8
dlib/svm/svm.h
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@ -627,10 +627,10 @@ namespace dlib
<< "\n\t is_binary_classification_problem(scores,labels): " << is_binary_classification_problem(scores,labels)
);
const T prior0 = sum(mat(labels)>0);
const T prior1 = sum(mat(labels)<0);
const T hi_target = (prior1+1)/(prior1+2);
const T lo_target = 1.0/(prior0+2);
const T num_pos = sum(mat(labels)>0);
const T num_neg = sum(mat(labels)<0);
const T hi_target = (num_pos+1)/(num_pos+2);
const T lo_target = 1.0/(num_neg+2);
std::vector<T,alloc> target;
for (unsigned long i = 0; i < labels.size(); ++i)