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Juliaでオンライン線形分類器つくった
1.
Juliaでオンライン線形分類器つくった SoftConfidenceWeighted.jl
2.
自己紹介 石田岳志 (@sonicair) 高専4年 来月成人式 ウサギィでバイトしてる お金もらってJulia書いてる
3.
SCWとは SCW (Exact Soft
Confidence-Weighted) 二値分類で使うアレ 逐次学習可能 高速・省メモリ SoftConfidenceWeighted.jlとして公開 © 2010 - 2014, scikit-learn developers
4.
Batch Learning (SVMなど) Model Model
5.
Batch Learning (SVMなど) Model Model
6.
Batch Learning (SVMなど) Model Model
7.
Online Learning (SCWなど) Model Model
8.
Online Learning (SCWなど) Model Model
9.
高速
10.
省メモリ
11.
精度どうなの?
12.
精度の比較 (vs. LinearSVC
in scikit-learn)
13.
速度比較
14.
学習時間の比較 (vs. LinearSVC
in scikit-learn)
15.
しくみ 分離平面の位置とその共分散を更新している
16.
まとめ 逐次学習可能 SVMと比べると精度は数%下がるがめっちゃ速い 省メモリ
17.
今後 共分散行列を対角成分のみで表現している →パフォーマンスを見ながら書きなおす 二値分類しかできない →多クラス分類に対応
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