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SVM--参数b 更新问题 #7

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a411919924 opened this issue Aug 15, 2018 · 0 comments

a411919924 commented Aug 15, 2018

你好，
有个小问题想请教下：

在李航书中130页，alpha1_new 和 alpha2_new同时在范围(0, C) 时，b_new = b1_new = b2_new, 否则 b_new = (b1_new + b2_new) / 2。

在你的svm.py 的175-180行，alpha1_new 和 alpha2_new 没有同时判断，alpha1_new 满足条件但alpha2_new不满足条件时，b_new发生错误更新。

还是个新手，不知道判断得是否正确。

感谢！

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