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Kaggle Rコンペ解法紹介
Shuhei Goda
July 13, 2019
Technology
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Kaggle Rコンペ解法紹介
Kaggle Tokyo Meetup 裏 #01
Shuhei Goda
July 13, 2019
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Transcript
(PPHMF"OBMZUJDT$VTUPNFS3FWFOVF1SFEJDUJPO 1VCMJDTU4PMVUJPOCFGPSFUIFDPNQFUJUJPOSFMBVODI ,BHHMFཪ.FFUVQ IBLVCJTIJO 8FMDPNFUP(PPHMF"OBMZUJDT $VTUPNFS3FWFOVF1SFEJDUJPO 1
ࣗݾհ !2 ໊લIBLVCJTIJO डୗੳձࣾͷσʔλαΠΤϯςΟετ ,BHHMFྺ ࠓ͢ίϯϖ
ίϯϖͷ֓ཁ !3 w ༰ (PPHMF.FSDIBOEJTF4UPSFͷސ٬͋ͨΓͷऩӹΛ༧ଌ͢Δ w ։࠵ظؒ ʙ
w ༻σʔλʹ͍ͭͯ (PPHMFBOBMZUJDTͰऔಘͰ͖Δσʔλ ֎෦σʔλΛ༻Մೳ w ͦͷଞ ௨শ3ίϯϖʢओ࠵͕3TUVEJPʣ
w 3.4& Z@IBUJTUIFOBUVSBMMPHPGQSFEJDUFESFWFOVFGPSBDVTUPNFS ZJTUIFOBUVSBMMPHPGUIFBDUVBMTVNNFESFWFOVFWBMVFQMVTPOF ධՁࢦඪ !4
w (PPHMF"OBMZUJDT͔ΒऔಘͰ͖Δσʔλͷ͏ͪҰ෦͕ఏڙ͞ΕΔ LFZ GVMMWJTJUPS*E WJTJU*E σʔλͷ֓ཁ !5 ม໊ ༰
ܕ GVMMWJTJUPS*E ϢʔβʔͷJE WJTJU*E ηογϣϯͷJE EBUF ηογϣϯͷ %BUF USBOTBDUJPO3FWFOVF ηογϣϯதͷऩӹ /VNFSJD EFWJDF Ϣʔβʔͷใ $BUFHPSZ USB⒏D4PVSDF τϥϑΟοΫͷࢀরݩใ $BUFHPSZ HFP/FUXPSL ϢʔβʔͷҐஔใ $BUFHPSZ UPUBMT ηογϣϯதͷΞΫγϣϯʹؔ͢Δूܭใ /VNFSJD
w USBJOͷظؒʙ w UFTUͷظؒʙ ༧ଌVTFS୯ҐͰࢉग़͢ΔͨΊɺQVCMJDͱQSJWBUFͷظؒҰக USBJOUFTUظؒ !6
5SBJOʢʣ 5FTUʢϲ݄ʣ
ίϯϖͷܦҢ
MPHTVNPSTVNMPH !8 w ධՁࢦඪʮMPHTVNʯͰ͋Δ͕ɺԿނ͔ʮTVNMPHʯͰग़ྗͨ݁͠Ռͷ ํ͕-#είΞ͕ྑ͘ͳΔɻ ˣܭࢉਖ਼࣮͘͠ߦ͞Ε͍ͯΔΒ͍͠
-FBEFSCPBSE6QEBUF ճ !9 w ӡӦଆͷϛεʹΑΓɺʮTVNMPHʯͰ-#͕ܭࢉ͞Ε͍ͯͨ͜ͱ͕໌
1VCMJD-#PWFSpUUJOH !10 w ͳΜ͔ͩΜͩͰఆҐʹͳͬͯتͿ
-FBLൃ֮ !11 w ωοτʹస͕͍ͬͯͨίϯϖσʔλ (PPHMF"OBMZUJDTͷσϞΞΧϯτΛͬͯऔಘՄೳ UFTUͷظؒίϯϖ։࠵࣌ΑΓલͰɺUFTUͷใऔಘͰ͖Δ
-FBEFSCPBSE6QEBUF ճ w σʔλظؒΛ৭ʑͱมߋͯ͠࠶ελʔτ 5SBJOʢϲ݄ʣ 1VCMJD ʢ̒ϲ݄ʣ
1SJWBUF ʢϲ݄ʣ 5SBJOʢʣ 5FTU ʢϲ݄ʣ !12 ࠶ελʔτޙͷઃఆ ࠷ॳͷઃఆ
ղ๏հ
Ϟσϧͷશମ૾ !14 w ηογϣϯ୯ҐͷϞσϧͱϢʔβʔ୯ҐͷϞσϧͷΞϯαϯϒϧ ηογϣϯ୯ҐͷϞσϧ MJHIUHCN ηογϣϯຖͷऩӹΛ༧ଌ Ϣʔβʔ୯ҐͷϞσϧ MJHIUHCN
Ϣʔβʔຖͷ૯ऩӹΛ༧ଌ Ϣʔβʔ୯ҐͷϞσϧ MJHIUHCN લஈͷ༧ଌͷجૅ౷ܭྔΛ ಛྔͱͯ͠༻ ΞϯαϯϒϧʢFMBTUJDOFUTUBDLJOHʣ 1PTUQSPDFTTJOH UPUBMCPVODFT
w ࣌ؒํͰަࠩݕূ͢ΔͷͰͳ͘ɺϢʔβʔຖʹ࣮۠ͬͯࢪ ηογϣϯ୯ҐͷϞσϧˠ(SPVQ,'PMEʢϢʔβʔͰΔʣ Ϣʔβʔ୯ҐͷϞσϧˠ,'PMEʢηογϣϯ୯ҐϞσϧʹ߹ΘͤΔʣ ཧ༝ͱͯ͠ 㾎ΞϯαϯϒϧͷͨΊʹɺUSBJOσʔλͷશϢʔβʔͷPPG WBMVF
USBJOظؒதͷ༧ଌऩӹͷ૯ ͕ཉ͍͠ 㾎UJNFTQMJU࠷ॳͷஈ֊Ͱࢼ͍ͯ͠Δɻൺֱͨ݁͠ՌɺHSPVQLGPME Ͱͳͦ͞͏ͩͬͨ 㾎QVCMJDͱQSJWBUFͷظؒಉ͡ͳͷͰɺίϯαόʹWBMJEBUJPOΛઃఆ ͠ͳͯ͘ͳ͍ͩΖ͏ͱஅʢQVCMJDΛͯʹ͍͚ྑ͍ʣ $7ʹ͍ͭͯ !15
w ͲͷΧςΰϦใׂͱϊΠδʔ ެ։LFSOFMͷ໊دͤॲཧͷ࠾༻ʴखಈ໊دͤΛ࣮ࢪ ޙͷಛྔ࡞Ͱޮ͍ͯ͘Δ෦ɺ͜͜ʹҰ൪࣌ؒΛ͔͚ͨ ΧςΰϦσʔλͷ໊دͤ !16 lEFWJDFPQFSBUJOH4ZTUFNzͷྫ
w ΧςΰϦσʔλͷಛྔ EFWJDFܥɺUSB⒏D4PVSDFܥ໊دͤͯ͠ΧςΰϦมԽ σʔλΛΧςΰϦຖʹूͯ͠ΤϯίʔσΟϯά ΧςΰϦมͷຒΊࠐΈදݱʢ-%"ʣ 5BSHFUFODPEJOH
'SFRVFODZFODPEJOH w σʔλͷಛྔ UPUBMܥCPVODFT IJUT QBHFWJFXT IJUT QBHFWJFXT #BTJD'FBUVSFʢηογϣϯ୯Ґʣ !17
w ಛྔੜରϨίʔυͷηογϣϯΛىͱͯ͠ɺۙޙͷใΛ ूͯ͠ಛྔͱͯ͠࠾༻͢Δ ݱ࣌ͷηογϣϯ͔Βকདྷ·ͨաڈOؒʹ͓͚Δ๚ճ ݱ࣌ͷηογϣϯ͔Βকདྷ·ͨաڈOؒʹ͓͚ΔIJUT QBHFWJFXTͷ૯
ͭઌ·ͨͭޙͷηογϣϯ·Ͱͷܦա࣌ؒ 5JNF'FBUVSFʢηογϣϯ୯Ґʣ !18
w ΧςΰϦσʔλͷಛྔ FODPEJOH͔ͯ͠ΒϢʔβʔຖʹू w σʔλͷಛྔ UPUBMܥCPVODFT IJUT QBHFWJFXT
IJUT QBHFWJFXT Λ Ϣʔβʔ୯Ґʹू #BTJD'FBUVSFʢϢʔβʔ୯Ґʣ !19
w ηογϣϯͷ࣌ؒใͷू 65$ɺ-PDBM5JNFͷEBUFใ EBZPGXFFL IPVS EBZ ΛɺDPT TJOʹ ղ͔ͯ͠Βू
5JNF'FBUVSFʢϢʔβʔ୯Ґʣ !20
w ηογϣϯͷ߹ܭώοτͱ߹ܭϖʔδϏϡʔͷൺ $7্͕Δ͕-#Լ͕Δ EJTDVTTJPOͷߘΛݟͯɺଞͷࢀՃऀಉ༷ͷݱ ཧ༝݁ہෆ໌͕ͩɺQBHFWJFXTIJUTSBUJPʹؔ͢ΔಛྔΛݢฒ Έআ֎͢Δ͜ͱͰ-#͕େ্͖͘ঢ QBHFWJFXTIJUTSBUJPಛྔͷআ֎
!21 IUUQTXXXLBHHMFDPNDHBDVTUPNFSSFWFOVFQSFEJDUJPOEJTDVTTJPOMBUFTU
w CPVODFTͷใΛ༻ͨ͠ޙॲཧ ίϯϖॳظ͔Βग़͍ͯͨใ ηογϣϯͷؼใϑϥάʢUPUBMTCPVODFTʣཱ͕͍ͬͯΔ͔Ͳ͏ ͔Ͱऩӹ͕͋Δ͔ͳ͍͔͕அՄೳ ϑϥάཱ͕͍ͬͯΔηογϣϯͷऩӹ༧ଌΛʹஔ 1PTUQSPDFTTJOH
!22 IUUQTXXXLBHHMFDPNDHBDVTUPNFSSFWFOVFQSFEJDUJPOEJTDVTTJPOMBUFTU