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野球データ分析ハッカソン準優勝解法と特徴量重要度 | AIMS #43 / baseball-hackthon-2nd-place-solution
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Shotaro Ishihara
December 21, 2018
Technology
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野球データ分析ハッカソン準優勝解法と特徴量重要度 | AIMS #43 / baseball-hackthon-2nd-place-solution
第43回の阪大AIメディカル研究会(
https://twitter.com/ou_aims/status/1073062205925470208?s=20)での発表資料
Shotaro Ishihara
December 21, 2018
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Transcript
ٿσʔλੳϋοΧιϯ ४༏উղ๏ͱಛྔॏཁ V !VQVSB ࡕେ"*ϝσΟΧϧݚڀձ ˏେࡕେֶਧాΩϟϯύε ݄
ࣗݾհ • اۀͰӦۀɾϚʔέςΟϯά͚ ͷσʔλੳˍ։ൃ • ,BHHMF&YQFSU "U$PEFS • IUUQTVQVSBIBUFOBCMPHDPN •
ࡢ͔ΒಠΓཱྀͰؔʹདྷ·ͨ͠
ຊͷ ʮٿσʔλੳϋοΧιϯʯͷ֓ཁ ४༏উͷղ๏ ಛྔͷॏཁ GFBUVSFJNQPSUBODF ݱ࣮ੈքͰͷ׆༻ࣄྫ
• ϚʔέςΟϯά • ҩྍ
ʮٿσʔλੳ ϋοΧιϯʯͷ֓ཁ
ٿͷσʔλΛੳ • ύγϑΟοΫϦʔάϚʔέςΟϯάגࣜձࣾ ڠྗ͠ɺ࣮ࡍͷٿͷσʔλΛੳ • ΤϯδχΞϦϯά෦ίϯαϧςΟϯά෦ • ࢀՃ෦ͷऴΘΓʹબ
ΤϯδχΞϦϯά෦ • ໊͕ࢀՃʢνʔϜ !͘Β͍ʣ • ؒͷ։࠵ʢ࣮ಇɿ࣌ؒʣ • ՝ʮͱ͋ΔٿஂͷϑΝϯΫϥϒձһ͕ ಛఆͷࢼ߹ʹདྷΔ͔൱͔ʯͷ༧ଌ •
ϑΝϯΫϥϒͷձһσʔλ • ʮϕʔεϘʔϧΦϖϨʔγϣϯʯͷσʔλ
༩͑ΒΕͨ՝ (BNF (BNF (BNF (BNF (BNF (BNF (BNF
ʜʜ ʜʜ ʜʜ BBB͞Μ CCC͞Μ DDD͞Μ ʜʜ YYY͞Μ ʜʜ ZZZ͞Μ ʜʜ [[[͞Μ ఏग़σʔλ \ ^ ϢʔβɿUSBJO UFTU͕ສਓͣͭ
ϚʔέςΟϯά • (BNFʙʹདྷ͔ͨ൱͔ʢUFTU·Ͱʣ • ੜ • ੑผ • ܧଓ •
ϙΠϯτʢ(BNFʙͷྦྷੵʣ • &$ߪೖֹۚʢ(BNFʙͷྦྷੵʣ
ϕʔεϘʔϧΦϖϨʔγϣϯ • ֤ଧऀͷࢼ߹͝ͱͷݸਓ • ֤खͷࢼ߹͝ͱͷݸਓ • ֤ࢼ߹ͷଧ੮͝ͱͷ݁Ռ
ධՁ • ඞਢ݅ɿϕʔεϘʔϧΦϖϨʔγϣϯ ͷσʔλΛೖྗʹ͏ • ֎෦σʔλͷ༻ېࢭ • ධՁج४ɿ༧ଌޡࠩ ˞ࠓճͷ߹ɺਖ਼ղͱಉٛ
!"#$ = 1 ' ( ) *+,- − *+,- / , *+,- ∈ 0, 1
ίϯαϧςΟϯά෦ • σʔλ͔Βʮ৽͍͠ൃݟʯΛಋ͖ग़͢ • ఏग़ͨ͠ϓϨθϯࢿྉΛجʹબൈ͞Εͨ ্ҐνʔϜ͕ϓϨθϯ • νʔϜ໊͕ࢀՃ
४༏উͷղ๏
ϝϯόʔͱํ • ਓνʔϜͰࢀՃ ʢશһ͕σʔλੳˍεϙʔπͷݟ͋Γʣ • ࣮ॳɺίϯαϧςΟϯά෦ʹࢀՃ༧ఆ • ࠷ॳʹཱͯͨԾઆͱਅٯͷੳ݁Ռ͕ग़ͨ! • όοΫΞοϓͰਐΊͨΤϯδχΞϦϯά෦
༧ଌਫ਼͕ྑ͔ͬͨͷͰɺํมߋ
ͷ ˞ओʹҎ֎ͷਓ͕ίϯαϧςΟϯά෦ɺ͕ΤϯδχΞϦϯά෦ Λݕ౼͓ͯ͠Γɺ࣌ίϯαϧςΟϯά෦ʹࢀՃ༧ఆͩͬͨ
୳ࡧతσʔλੳ • (BNFʙͷདྷใ͕ެ։͞Εͨສਓ தͷདྷਓɿ • (BNFˠਓ • (BNFˠਓ • (BNFˠਓ
• ʮ(BNF౷ܭతػցֶश͕͑ͦ͏ʯ • ʮ(BNFͱɾɾɾʯ (BNFʙͰɺ ʮສਓதສਓఔʯ ͕ѹతʹଟ͔ͬͨ
(BNFʢͷ୲ʣ • ಛྔ • ϑΝϯΫϥϒձһ͕ʮࠓقॳΊͯࢀՃͨ͠ࢼ߹ʯ ͷϕʔεϘʔϧΦϖϨʔγϣϯͷใ • ྫɿຊྥଧɺಘɺΤϥʔͳͲ • ʮࢼ߹ʹདྷΔ͔൱͔ॳΊͯͷࢼ߹ͷҹ͕ޮ͘ʯͱ
͍͏ܾΊଧͪͷԾఆΛஔ͍ͨ • ϚʔέςΟϯάͷσʔλ • ߹ܭɺִؒɺۙOࢼ߹ͳͲ
(BNFʢͷ୲ʣ • ༧ଌϞσϧ • TLMFBSOͷ(SBEJFOU#PPTUJOH$MBTTJGJFS • (SJE4FBSDI • 4FFEΛม͑ͯछྨΛΞϯαϯϒϧ •
-JHIU(#.ͳͲɺͦͷଞͷϞσϧ͋·Γਫ਼͕ ग़ͳ͔ͬͨ
(BNFɺʢҎ֎ʣ • དྷऀগͳ͍ˍධՁج४ʮਖ਼ʯ • શһʮདྷͳ͍ʯͱ༧ଌ͢Εਖ਼͑ • • ઈରʮདྷΔʯਓ͚ͩΛਓྗͰ୳ͦ͏ʂ •
(BNFʙશࢼ߹ࢀՃ͍ͯ͠Δਓ • USBJOສਓʹɺ(BNFɺ͚ͩདྷͳ͍ਓ • ଐੑͳͲͰߜΓɺઈରʮདྷΔʯਓΛਓબఆ
-FBLBHF୳͠ʢࣦഊʣ • ϙΠϯτͱ&$ߪೖֹۚɺ(BNFʙͷ ྦྷੵͳͷͰɺ(BNFʙͷདྷใ͕ ೖ͍ͬͯΔʁ • ϙΠϯτͷফԽɺ&$Ҏ֎Ͱͷߪೖ͕͋ͬͨ • ՈΧοϓϧ୳͠ʢֶशσʔλͱςετ σʔλʹ͔Ε͍ͯͳ͍͔ʁʣ
• ֬ূ͕࣋ͯͣ
݁Ռʢ੯͘͠Ґʣ ˢҐͷUBLVPLP͞ΜʹΑΔղ๏·ͱΊ
ֶͼ • ՝ʹԠͯ͡ػցֶशͱਓྗΛ͍͚Δ • ୳ࡧతσʔλੳͷॏཁੑ • ධՁج४ͷେ͞ • ࠓճͷ༧ଌϞσϧͰͷಛྔͷॏཁ ˢڪΒ͘։࠵ଆ͕ٻΊΔݟ
ಛྔͷॏཁ GFBUVSFJNQPSUBODF
ಛྔͷॏཁͱ • ࡞ͨ͠༧ଌϞσϧͰɺೖྗͷ֤ಛྔ ͕ʮͲͷఔޮՌΛൃش͔ͨ͠ʯࣔ͢ • ࠓճͷ߹ʮͲΜͳϓϨʔ͕དྷʹܨ͕Δ ͷ͔ʁʯΛࣔࠦ͢ΔՄೳੑ͋Γ • ܭࢉํ๏͞·͟·ɻಋग़ͷഎܠΛཧղ͠ɺ ͝ར༻ܭըతʹɻ
δχ͕ΘΕ͍ͯΔ ˞ TLMFBSOͷܥͷϞσϧͷ߹ IUUQTHJUIVCDPNTDJLJUMFBSOTDJLJUMFBSOCMPCNBTUFSTLMFBSOUSFFUSFFQZ--
δχ • ࣾձʹ͓͚Δॴಘͷෆฏ͞ΛଌΔࢦඪ ্ͷۭؒɿෆฏ͕ଘࡏʢδχˢʣ Լͷۭؒɿෆฏ͕ଘࡏʢδχˢʣ ࠨͷۭؒɿօಉ͡ʢδχˣʣ ӈͷۭؒɿօಉ͡ʢδχˣʣ δχ͕খ͍͞΄Ͳʮྑׂ͍ʯ
δχͷར • ʮྑׂ͍ʯ͔ධՁͰ͖Δ ࠨͷۭؒɿօಉ͡ ӈͷۭؒɿօಉ͡ ׂ͢ΔΛδχͷͰஅͰ͖Δ ࠨͷۭؒɿօಉ͡ ӈͷۭؒɿෆฏ͕ଘࡏ
δχͷԼ͕Γ߹͍ !" !# $ % !#ͷ࣠Ͱׂ͢Δͱɺδχ͕Լ͕Δˠ !#ʮॏཁʯ !"ͷ࣠Ͱׂ͢Δͱɺδχ͕Լ͕Βͳ͍ˠ !"ʮॏཁʯͰͳ͍
ಛྔͷॏཁ • ॏཁ͕ߴ͔ͬͨಛྔ • ࡾྥଧͷ • ܟԕͷ • ϑΝϯΫϥϒձһίΞͳਓ͕ଟ͘ɺ୯ͳΔ ಘຊྥଧͷͰདྷ͢Δ͔൱͔Λఆ
Ͱ͖ͳ͍ʁ
ݱ࣮ੈքͰͷ׆༻ࣄྫ
ࣄྫϚʔέςΟϯά • XFCαʔϏεͷ͓ࢼ͠ˠຊܖʹࢸΔ͔Λ ༧ଌ͢Δ • ೖྗʹ༻͍ͨϢʔβଐੑߦಈཤྺͷ͏ͪ Կ͕༧ଌʹޮՌత͔ͩͬͨʁ • ॏཁͷߴ͍ಛྔʹӨڹΛ༩͑ΔࢪࡦΛ ͯ͠Έͯʁ
ࣄྫߎ࠹ͷ༧ଌ • ޯϒʔεςΟϯάͰ༧ଌ͠ɺ༧ଌʹؔ͢Δ ֤ಛͷد༩Λࢉग़ ʢܭࢉख๏ʮ1BSUJBM%FQFOEFODF1MPUʯ ͳͷͰલड़ͷಛྔͷॏཁͱҟͳΔʣ • ྟচͷݱͰ༧ޙ༧ଌҼࢠͱͯ͠ΒΕΔ ʮൃલN34ʯʮྸʯͳͲ͕நग़Ͱ͖ͨ
˞ʮػցֶशख๏Λ༻͍ͨߎ࠹ͷ༧ޙ༧ଌҼࢠͷநग़ʯ ਓೳֶձݚڀձࢿྉ
·ͱΊ
·ͱΊ • ʮٿσʔλੳϋοΧιϯʯͷ४༏উղ๏ ͱಘΒΕͨݟΛڞ༗ͨ͠ • ʮಛྔͷॏཁʯͷҰͭͷܭࢉํ๏Λઆ໌ ͠ɺ۩ମతͳ׆༻ࣄྫΛհͨ͠ • ʢϥϯμϜੑؔΘΔͳͷͰɺҙࢥܾఆͷ ࢀߟఔͷར༻͕·͍͠ͱࢥ͏ʣ
ࢀߟࢿྉ • ࡢެ։͞Εͨൃදࢿྉ͕ɺඇৗʹྑ͍ IUUQTXXXTMJEFTIBSFOFU4BUPTIJ)BSBTT