Slide 1

Slide 1 text

؂ࢹͷͨΊͷ౷ܭೖ໳ @takasp 2023೥8݄17೔

Slide 2

Slide 2 text

ΞδΣϯμ • ਪଌ͢ΔͳɺܭଌͤΑ • ౷ܭೖ໳ • ฏۉɺҠಈฏۉ • தԝ஋ • पظੑ • ෼Ґ਺ɺύʔηϯλΠϧ • ·ͱΊ

Slide 3

Slide 3 text

ਪଌ͢ΔͳɺܭଌͤΑ

Slide 4

Slide 4 text

ਪଌ͢ΔͳɺܭଌͤΑ • Rob PikeࢯͷCϓϩάϥϛϯάʹؔ͢Δ֮͑ॻ͖͕ݩωλ • ϧʔϧ1: ϓϩάϥϜ͕Ͳ͜Ͱ࣌ؒΛফඅ͢Δ͜ͱʹͳΔ͔஌Δ ͜ͱ͸Ͱ͖ͳ͍ɻϘτϧωοΫ͸ڻ͘΂͖ՕॴͰى͜Δ΋ͷͰ ͋Δɻ͕ͨͬͯ͠ɺͲ͕͜ϘτϧωοΫͳͷ͔Λ͸͖ͬΓͤ͞ Δ·Ͱ͸ɺਪଌΛߦͬͨΓɺεϐʔυϋοΫΛͯ͠͸ͳΒͳ͍ɻ • ϧʔϧ2: ܭଌ͢΂͠ɻܭଌ͢Δ·Ͱ͸଎౓ͷͨΊͷௐ੔Λͯ͠ ͸ͳΒͳ͍ɻίʔυͷҰ෦͕࢒ΓΛѹ౗͠ͳ͍ͷͰ͋Ε͹ɺͳ ͓͞ΒͰ͋Δɻ 8JLJQFEJBʮ6/*9఩ֶʯIUUQTKBXJLJQFEJBPSHXJLJ6/*9&#&"%"

Slide 5

Slide 5 text

౷ܭೖ໳

Slide 6

Slide 6 text

ฏۉʢmean / average) • ू߹಺ͷ஋Λશͯ଍ͯ͠ɺू߹ͷཁૉ਺Ͱ ׂͬͨ΋ͷ • ू߹ͷݸผͷ஋Λ֬ೝ͠ͳͯ͘΋ͲͷΑ͏ͳ ΋ͷ͔ද͢ͷʹศརͳ஋ avg = data1 + data2 + . . . + data n n

Slide 7

Slide 7 text

Ҡಈฏۉʢmoving averageʣ • ҠಈฏۉΛద༻͢Δͱࣝผ͠΍͍͢ύλʔϯΛ࣋ͭσʔληοτʹͳΔɻ • εύΠΫͷଟ͍άϥϑΛฏ׈ԽͰ͖Δɻ • ͨͩ͠ɺॏཁͳσʔλϙΠϯτΛࣦ͏Մೳੑ͕͋Δɻ ౷ܭ8&#ʮ࣌ܥྻσʔλͱҠಈฏۉʯIUUQTCFMMDVSWFKQTUBUJTUJDTDPVSTFIUNM

Slide 8

Slide 8 text

தԝ஋ʢmedianʣ • σʔλΛঢॱʹฒͼସ͑ͨ࣌ͷਅΜதʹҐஔ͢Δ஋ • ฏۉ͕ର৅Λਖ਼֬ʹද͞ͳ͍ͱ͖ʹ࢖͑Δ • σʔλͷ਺͕ح਺ͷ࣌ɿਅΜதͷ஋ • σʔλͷ਺͕ۮ਺ͷ࣌ɿਅΜதͷ2ͭͷ஋ͷฏۉ median(0, 1, 1, 2, 3, 5, 8, 13, 21) = 3 median(0, 1, 1, 2, 3, 5, 8, 13, 21, 34) = 4

Slide 9

Slide 9 text

पظੑʢseasonalityʣ • σʔλϙΠϯτ͕ύλʔϯΛ܁Γฦ͢͜ͱ %BUBEPH%PDTʮҟৗݕ஌ϞχλʔʯIUUQTEPDTEBUBEPHIRDPNKBNPOJUPSTUZQFTBOPNBMZ • ಉ͡ύλʔϯ͕ଓ͘͜ͱ͕Θ͔ΔͱະདྷͷܭըΛཱͯͨΓɺ 
 ༧ଌͨ͠Γ͢Δͷʹ࢖͑Δ • ಥવ൒෼ʹͳͬͨΓɺ2ഒʹͳͬͨΓͨ͠Βௐ͕ࠪඞཁͳ͜ͱ͕Θ͔Δ

Slide 10

Slide 10 text

෼Ґ਺ʢquantileʣ • σʔληοτͷ͋Δ఺Λද͢౷ܭతख๏ • ୅දྫ • ୈ2࢛෼Ґ਺ʢதԝ஋ɺ50ύʔηϯλΠϧʣ • ύʔηϯλΠϧ

Slide 11

Slide 11 text

ύʔηϯλΠϧʢpercentileʣ • ύʔηϯςʔδʢ0 - 100ʣͰσʔληοτ಺ͷ఺Λ 
 දݱ͢Δ • σʔλΛঢॱʹฒͼସ͑ɺখ͍͞ํ͔Βn%ʹҐஔ͢Δ஋ • ଟ͘ͷϢʔβʔʹͱͬͯϨΠςϯγ͕Ͳ͏͔ͩͬͨʢେଟ਺ ͷϢʔβʔʹର͢ΔαʔϏε඼࣭ʣͳͲͷ৘ใ͕ಘΒΕΔ • ʢ100 - nʣ%ͷσʔλϙΠϯτΛࣺ͍ͯͯΔͷͰɺ 
 ϨΠςϯγͷ৔߹͸࠷େ஋ΛݟΔͳͲͷผͷ؂ࢹ͕ඞཁ

Slide 12

Slide 12 text

·ͱΊ

Slide 13

Slide 13 text

·ͱΊ • ฏۉ͸Α͘࢖ΘΕΔؔ਺ɻ 
 தԝ஋΋σʔλʹΑͬͯ͸ศརɻ • पظੑ͸ɺ࣌ܥྻσʔλͷύλʔϯΛݟ͚ͭΔͷʹ 
 ྑ͍ํ๏ɻ • ύʔηϯλΠϧ͸σʔλͷ͓͓Α͕ͦ 
 Ͳ͏ͳ͍ͬͯΔ͔ཧղ͢Δͷʹศརɻ 
 ͨͩ͠ɺۃ୺ͳσʔλΛແࢹ͍ͯ͠Δ͜ͱʹ஫ҙɻ

Slide 14

Slide 14 text

ಛੑΛཧղͯ͠࢖͍·͠ΐ͏

Slide 15

Slide 15 text

ࢀߟจݙ • “UNIX఩ֶ” . Wikipedia . 2023 . https://ja.wikipedia.org/wiki/ UNIX%E5%93%B2%E5%AD%A6 , (ࢀর 2023-08-16) • גࣜձࣾࣾձ৘ใαʔϏε . “32-3. ࣌ܥྻσʔλͱҠಈฏۉ” . ౷ܭWEB . 2023 . https://bellcurve.jp/statistics/course/12933.html , (ࢀর 2023-08-16) • Datadog, Inc. . “ҟৗݕ஌Ϟχλʔ” . Datadog Docs . 2023 . https:// docs.datadoghq.com/ja/monitors/types/anomaly/, (ࢀর 2023-08-16) • Mike Julian . ೖ໳ ؂ࢹʕϞμϯͳϞχλϦϯάͷͨΊͷσβΠϯύλʔϯ . גࣜձࣾΦϥΠϦʔɾδϟύϯ , 2019