PHP-MLを使ってみた話

by Keisuke Iwabuchi

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PHP-MLΛ࢖ͬͯΈͨ࿩ 2017/08/08 PHP BLT #8 Keisuke Iwabuchi

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ࣗݾ঺հ ໊લ : ؠ෵ܙี ( Keisuke Iwabuchi ) Twitter : @bucchi49 झຯ : FXʢಛʹγεςϜτϨʔυ͕޷͖ʣ ձࣾ : גࣜձࣾΰΰδϟϯ ʢ࠷ۙσΟʔϓϥʔχϯά͸͡Ί·ͨ͠ʣ

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PHP͸ػցֶशͰ͖ͳ͍ͷʁ

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͋ͬͨʂ

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PHP-ML Machine Learning library for PHP MIT License PHP >= 7.0 https://github.com/php-ai/php-ml ※ࠓ೔ͷࢿྉ͸v0.4.1Λ࢖ͬͯ·͢ɻ

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PHP-MLΛ࢖ͬͯΈΔ ɾࠓճ͸χϡʔϥϧωοτϫʔΫΛࢼ͢ ɾେ͖͘෼͚ͯ3ͭͷεςοϓͰ࣮૷͢Δ 1. ωοτϫʔΫͷ࡞੒ 2. ܇࿅ 3. ༧ଌ

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εςοϓ̍ɹωοτϫʔΫͷ࡞੒ MLPClassiﬁerΠϯελϯεΛ࡞Δ ೖྗ૚, ӅΕ૚, ग़ྗ૚ͷχϡʔϩϯ਺Λࢦఆ

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εςοϓ̎ɹ܇࿅ trainϝιουʹඪຊͱ౴͑Λ౉͢ partialTrainϝιουͰόονॲཧ΋Մೳ

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εςοϓ̏ɹ༧ଌ predictϝιουΛ࣮ߦͯ͠༧ଌ஋ΛಘΔ

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جຊ͸͜Ε͚ͩ

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ଞʹͰ͖Δ͜ͱ • σʔλͷલॲཧ • ਖ਼نԽʢL1 norm, L2 normʣ • ܽଛ஋ͷิ׬ • σʔλͷ෼ׂ • ແ࡞ҝ෼ׂ • ૚ผແ࡞ҝ෼ׂ

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αϯϓϧίʔυɿΞϠϝΛ෼ྨ

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αϯϓϧίʔυɹଓ͖ ෼ྨਫ਼౓ɹ97.78%

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PHP-MLͰ͍᪴ͨͱ͜Ζ ϕετ̎

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̎Ґ

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ηʔϒػೳ͕ݟ͔ͭΒͳ͍ • ܇࿅݁Ռͷอଘํ๏͕υΩϡϝϯτʹࡌͬͯͳ͍ • ηʔϒػೳͳ͍ͱຖճܭࢉ͕ඞཁ • ࠷ॳ͸ແ͍΋ͷͩͱࢥͬͯࣗલͰ࣮૷ͨ͠ • ιʔεΛΑ͘ݟΔͱଘࡏ͢Δ

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܇࿅݁ՌΛอଘ͢Δʹ͸ʁ • ModelManagerΫϥεΛ࢖͏ • saveToFileϝιουͰηʔϒ • restoreFromFileϝιουͰ෮ݩ

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̍Ґ

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composer͕མͱ݀͠ • composerͰΠϯετʔϧ͢Δํ๏͕঺հ͞Ε͍ͯΔ • ͔͠͠composerͰಋೖ͢ΔͱMLPClassiﬁer.php͸ଘࡏ͠ͳ͍ • ͭ·ΓχϡʔϥϧωοτϫʔΫ͸࣮ߦͰ͖ͳ͍ • Github͔Β௚઀མͱͯ͘͠Δͷ͕ਖ਼ղ

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·ͱΊ • ؾܰʹ࣮૷Λମݧ͢Δʹ͸PHP-ML͕దͯ͠Δ • ػೳͷॆ࣮౓͸ଞͷϥΠϒϥϦʹྼΔ • PHPͰຊ֨తͳػցֶश͸࣮༻తͰ͸ͳ͍ • ૉ௚ʹPython֮͑·͠ΐ͏ • PHPͷͳΜͰ΋͋Δͱ͜Ζ͕޷͖

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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ɻ