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lt1
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yamika
December 24, 2017
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yamika
December 24, 2017
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Transcript
σʔλੳίϯϖೖ @owatank
ࣗݾհ • ໊લ : ଜࢁͻ͞Έ • ֶ෦3ɺஸֶݚॴଐ • ࠷ۙػցֶशएखͷձߦ͖ͬͯͨ •
ϒϩά(http://owatank.hatenablog.com/)
Kaggleͱʁ
ҰݴͰݴ͏ͳΒ σʔλੳͷίϯϖςΟγϣϯ
KaggleͬͯͳΜͩΑ • اۀͳͲͷ৫͕σʔλΛఏڙͯ͘͠ΔͷͰͦͷσʔλΛ ੳ͠ɺ͜͏͕ཁٻ͢ΔΑ͏ͳྨճؼϞσϧΛ࡞ͬ ͯͦͷϞσϧͷਫ਼Λڝ͍߹͏σʔλ༧ଌίϯϖςΟγϣ ϯ • είΞఏग़༻ͷςετσʔλʹର͢Δ༧ଌͷ݁ՌΛCSV ϑΝΠϧͳͲʹอଘͯ͜͠͏Ͱطʹ༻ҙͯ͋͠Δ͑ͱ ͲΕ͚ͩҰக͍ͯ͠Δ͔ͷ(Log
LossͳͲ͕ଟ͍) • ίϯϖʹΑͬͯۚ(1000~50ສɺنʹΑΔ)͕ग़Δ
ॳ৺ऀͩͱਏͦ͏ʁ
Kaggleσʔλੳͷษڧͱ ͯ͠ར༻Ͱ͖Δ
ษڧͬͯʁ • Kaggleʹ Kernel ͱݺΕΔࢀՃऀ͕ͲͷΑ͏ͳख๏Λ ͬͯείΞΛग़͔ͨ͠ͱ͔͕Θ͔Δهࣄ͕༻ҙ͞Ε͍ͯ ΔɻӳޠͳͷͰؾ߹ͰಡΉ • ਓʹΑͬͯஸೡͳจষͩͬͨΓιʔείʔυ·Ͱ͚ͬ ͯ͘Ε͍ͯͨΓͯ͠σʔλੳ༻ͷϑϨʔϜϫʔΫͷ͍
ํͷ࿅शʹͳΔ • ίϯϖͰͳ͘ϑϦʔͷσʔληοτΛ༻ҙͯ͋͠ΔͷͰɺ ͦΕΛͬͯ༡ΜͩΓɺKernelͰಘͨࣝΛࢼ͢͜ͱͰ ͖Δɻ
νϡʔτϦΞϧ༻ҙ͞Ε͍ͯΔͷͰ ͬ͞͞ͱ࢝Ίͨํ͕͓ಘ
ͱݴ͏Θ͚Ͱ νϡʔτϦΞϧΛͬͯΈΔ
None
νϡʔτϦΞϧ • ૣ͍͕ʮ༗໊ͳλΠλχοΫ߸ͷ٬σʔλΛ͋͛Δ͔Β͋Δ ٬͕σʔλ͔Βੜଘऀ͔ࢮऀ͔Ͳ͔ͬͪྨͯ͠Ͷʯͱ͍͏ ͜ͱ • ༩͑ΒΕͨσʔλͷཁૉͱͯ͠ɺ٬ऀͷ໊લɺྸɺੑผɺધ ͷνέοτ൪߸ɺνέοτͷΫϥε(ඈߦػͰݴ͏ΤίϊϛʔΫϥ εͱ͔)ͦͯ͠ੜଘorࢮ͔Ͳ͏͔ͳͲ͕ೖ͍ͬͯΔ
σʔλੳͷϑϨʔϜϫʔΫͱͯ͠ pandasΛ༻͢Δ
σʔλͷதͱͯ͠ ઌ಄ͷ̑ͭ΄Ͳ֬ೝͯ͠ΈΔ
None
ಛʹԿݟ͑ͯ͜Ͷ͑ɾɾɾ ·ͣੜଘऀͱࢮऀͷׂ߹ͰݟΔ
̌ʹࢮऀͳͷͰ ࢮऀͷ͕ଟ͍͜ͱ͕Θ͔Δ
Fare(ӡ)͕ߴ͍ਓ΄Ͳ ͓ۚ࣋ͪʹ༏۰͞Εͦ͏ ʹੜଘߴͦ͏ʂʂʂ ͱݴ͏ԾઆΛཱͯͯݟ͍ͯ͘
̔̌̌ʙ̌̌̕ʢۚͷ୯ҐΒΜʣ ͜ͷͷਓͨͪ݁ߏੜ͖ͬͯͦ͏
దʹ̍̌Ͱ۠ͬͯͦͷ࣌ͷ ੜଘऀͷׂ߹Λ͔֬ΊΔ
None
ׂ߹͔ΒݟΔʹFareͷ͕ େ͖͍ਓੜଘ͕ߴ͍ ͭ·ΓFareྨʹ͑ͦ͏ʂʂʂ
࣍ঁੑͷํ͕ٹॿ͞Εͦ͏ ࢠڙྸ͕ए͍ਓ༏ઌతʹٹॿ͞ Εͦ͏ͱ͍͏ԾઆΛཱͯͯௐͯΈΔ
ੑผ
ྸʢ10ࡀͰ۠ͬͨʣ
ঁੑͷ͕ੜଘऀͷׂ߹ଟ͍͠ ྸए͍ਓ΄Ͳੜଘऀ͕ଟ͍ ͭ·Γੑผͱྸྨʹ͑ͦ͏
͜Μͳײ͡ͰԾઆΛཱͯͯ ੜଘऀͷׂ߹ΛݟͨΓͯͦ͠ͷಛ͕ ͑ͦ͏͕ݟ͍ͯ͘
࠷ऴతʹྨʹ͏ͨΊͷ ಛΛߜ͍ͬͯ͘
XGBoostͱ͔ͷܾఆʁ SVM? DeepLearning?
ਖ਼ղͳ͍ͷͰύϥϝʔλΛ ͍ͬͯ͡࠷దͳͷΛબͿ
DeepLearning
XGBoost
ྨϞσϧΛ࡞ͬͯ܇࿅σʔλͷ ̒ʙׂ̔΄ͲֶͬͯशΛ͢Δ Γͷ̐ʙׂ̎Ͱ֤Ϟσϧͷ ਫ਼ൺֱΛͯ͠ΈΔ
None
ϞσϧͷධՁ ଛࣦؔͷ͚ͩͰͳ͍͜ͱʹ ҙ
Ϟσϧ࡞ͬͨ͠ ૣఏग़༻ͷςετσʔλʹରͯ͠ ద༻ͯ͠ఏग़͢Δ ͜Ε
ίϯϖͷϖʔδʹ͋Δ Submit PredictionʹඈΜͰ ఏग़༻ͷcsvϑΝΠϧΛ͛Δ
Make Submission Λ ԡ͢ͱ͜͏ͰείΞΛܭࢉͯ͠ ݁ՌΛฦͯ͠དྷΔ
͜ͷσʔλੳίϯϖͩͱ 0.76~0.78͋ͨΓ͕ฏۉ 0.8Λ͑ΔͱΊͬͪΌϥϯΫ্͕͕Δ
είΞΛ্͛ΔͨΊʹ ৽͍͠ಛ͕͍Δ͔ɺͦΕͱ ͬͨಛͷߜΓࠐΈ͕ඞཁ͔ ૬ؔ͋Δ͔ ΤϯτϩϐʔΛͬͨಛͷߜΓࠐΈ ॏճؼੳͳͲͳͲ
վྑͷ༨ͨ͘͞Μ͋Δ
ύϥϝʔλ͍ͬͯͨ͡Β࠷ߴείΞ ͜ΜͳΜʹͳͬͨ(ࠓ์ஔ͗ͨ͢͠ͷ͔ ίϯϖ͔Βଘࡏࣗମফ͑ͨ)
ߦ͖٧·ͬͨΒ Kernel ಡΜͰݟΛಘΔͷ͕Ұ൪
ਓʹΑͬͯ σʔλ͔Β༵σʔλɺఱؾใ ΛͲ͔͔ͬΒҾͬ͜ൈ͍ͯ ৽͍͠ಛͱͯ͠σʔλʹ͚ͬͭͨ͘ Γ͢Δख๏Λ͢Δਓ͍Δ
ίϯϖࣗମλΠλχοΫͷΑ͏ͳ σʔλ͚ͩͰ༧ଌΛ͢Δͷ͚ͩ Ͱͳ͘ը૾ྨԻೝࣝɺϊΠζ আڈͳͲ৭ʑ͋Δ
ձେͰKaggleΓͯʈʙ
͜ΜͳΜ
य़ٳΈ·Ͱʹ࡞Δʢ༧ఆʣ
σʔλੳΤϯδχΞ ૿͑ͯݟΛत͚ͯ΄͍͠
ࢀߟจݙ • https://www.codexa.net/what-is-kaggle/