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データサイエンス初心者講座_Kaggle入門.pdf
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RyoMaekura
May 20, 2019
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データサイエンス初心者講座_Kaggle入門.pdf
RyoMaekura
May 20, 2019
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Transcript
Kaggleೖ ~AIMSσʔλαΠΤϯεॳ৺ऀߨ࠲~
ΞδΣϯμ 1. ࣗݾհ 2. ޯϒʔεςΟϯά 3. LightGBM 4. ϞσϧͷϒϨϯυ
ࣗݾհ ໊લɿલଂ ྒྷ ॴଐɿجૅੑཧ 3 ࣮ɿ৽ถKaggle Expert λϯύΫ࣭ίϯϖ ಔ Santerder
ۜ ࠷ۙɿྔࢠܭࢉ(ྔࢠԽֶʁ) ͷษڧΛ࢝Ί·ͨ͠
ޯϒʔεςΟϯά 1. Կ͔͠Βͷํ๏ͰճؼΛߦ͍, ͦͷؔΛɹɹ Ͱද͢. F0 (x) 2. ਅͷΛ ͱͯ͠,
ࠩΛܭࢉ͢Δ. y y − F0 (x) 3. 2ͰಘΒΕͨࠩʹରͯ͠ճؼΛߦ͍, ͱ͢Δ. h1 (x) 4. Ϟσϧͷߋ৽Λߦ͍, ৽ͨͳؔΛ Ͱද͢. F1 (x) = F0 (x) + h1 (x) F1 (x)
ޯϒʔεςΟϯά Ͱ࣮ࡍʹՄࢹԽͯ͠Έ·͠ΐ͏
ޯϒʔεςΟϯά ҙͷσʔλΛ20ݸ༻ҙ ɿ࠷ॳͷۙࣅ ɿ1ճͷߋ৽ ࠇɿ2ճͷߋ৽
ϞσϧͷϒϨϯυ όΠΞεɿޡࠩͷฏۉɹόϦΞϯεɿ༧ଌͷࢄ
ϞσϧͷϒϨϯυ Ϟσϧ1 Ϟσϧ2 Ϟσϧ3 Ϟσϧ4 Ϟσϧ5 ৽͍͠Ϟσϧ newmodel = (model1
+ model2 + model3 + model4 + model5)/5
LightGBM https://www.kaggle.com/ryomaekura/aims-kaggle- seminar-2nd-day