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LIBLINEAR 2.1 multiclass logistic regression patch from http://blog.goo.ne.jp/nakano-tomofumi/e/27d8b7b18ec74b41f16e64aa0006391d
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| --- linear.cpp 2015-09-27 07:03:33.000000000 +0900 | |
| +++ new_linear.cpp 2016-04-09 01:32:23.000000000 +0900 | |
| @@ -2685,9 +2685,10 @@ double predict_probability(const struct | |
| double label=predict_values(model_, x, prob_estimates); | |
| for(i=0;i<nr_w;i++) | |
| - prob_estimates[i]=1/(1+exp(-prob_estimates[i])); | |
| + prob_estimates[i]=exp(prob_estimates[i]); | |
| if(nr_class==2) // for binary classification | |
| + prob_estimates[0]=1/(1+1/prob_estimates[0]); | |
| prob_estimates[1]=1.-prob_estimates[0]; | |
| else | |
| { |
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パッチの作成ありがとうございます。
ところで、トリッキーなC言語の仕様のため、二つ目の修正箇所の if 文の中は、複数なので、else以降のように{} の括弧が必要なんです。