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Coursera Machine Learning メモ

Last updated at Posted at 2020-05-17

Coursera の Machine Learningのコースを受ける際に役に立つサイトなどのメモ

数学の苦手なバイオの学生がCourseraの機械学習コースを修了して気づいたこと

学習の予習・復習に

まくまくOctaveノート

プログラミング課題用。Octaveのまとめ

(27) Octaveでコマンドラインデバッグ

プログラミング課題用。デバッグ大事

Optimization Objective

ロジスティック回帰

コスト関数

-y log \frac{1}{1 + e^{-z}} - (1-y)log(1 - \frac{1}{1 + e^{-z}})

$ y = 1 $ のとき

-log \frac{1}{1 + e^{-z}}

スクリーンショット 2020-06-07 16.11.48.png

$ y = 0 $ のとき

-log(1 - \frac{1}{1 + e^{-z}})

スクリーンショット 2020-06-07 16.12.07.png

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