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python 機械学習について
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Takayuki
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January 01, 2018
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python 機械学習について
Takayuki
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January 01, 2018
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Transcript
ςΩετ ػցֶशʹ͍ͭͯ ླ೭ɹ2016/04/30
ػցֶशͱ ίϯϐϡʔλʔͰΞϧΰϦζϜΛߏங͠ɺֶशσʔ λΛಡΈࠐ·ͤΔ͜ͱͰɺࣗಈతʹࠓ͋ΔσʔλΛ ྨˍ·ͩݟ͵σʔλΛ༧ଌͰ͖ΔΑ͏ʹ͢Δͷ ώτͷใॲཧೳྗΛ͑ͯɺෳࡶͳσʔλΛྨ ˍ༧ଌͰ͖ΔΑ͏ʹ͢Δͷ
Scikit-learnͬͯͳʹʁ PythonͰ࡞ΒΕͨػցֶशϥΠϒϥϦ ແྉɾ༗ྉؚΊͯɺίϨ΄Ͳॆ࣮ͨ͠ϥΠϒϥϦଞʹͳ͍ ๛ͳྨثͱ(΄΅)౷ҰԽ͞ΕͨAPI ݕূ࡞ۀΛࢧ͑Δػೳ Numpy, ScipyΛ༻ͨ͠ߴͳԋࢉ http://scikit-learn.org/
ͷճΓʹ͋Δػցֶशͷࣄྫ εύϜఆɿ ϝʔϧ͕εύϜ͔൱͔Λఆ Ϧίϝϯυɿʮ͜ͷΛങͬͨਓ͜Μͳ ങ͍ͬͯ·͢ʯ ը૾ೝࣝɿ PicasaͷإೝࣝػೳͳͲ
ػցֶश͕ಘҙͱ͢Δ େྔͷσʔλΛͬͯɺະͷσʔλΛྨ ※গྔσʔλͳΒਓ͕ؒؤுͬͨํ͕ૣ͍ ⚪⚪ͱ͍͏୯ޠ͕͋ΕεύϜɺͱ͍͏ύλʔϯΛ࡞
ػցֶशͷྨ ڭࢣ͖ ਖ਼ղσʔλ͕༩͑ΒΕ͍ͯΔ ະͷσʔλʹର͢Δ༧ଌΛߦ͏ ڭࢣͳ͠ ਖ਼ղσʔλ͕༩͑ΒΕ͍ͯͳ͍ ະͷσʔλ͔ΒنଇੑΛൃݟ͢Δ
ڭࢣ͖ͱڭࢣͳֶ͠शͷҧ͍ ڭࢣ͖ ڭࢣͳ͠ ը૾σʔλ͕͋Δ͚ͩͰɺֶ शΞϧΰϦζϜɺ ͜ͷσʔλ͚ͩΛΈͯ͜ͷσʔ λͷੑ࣭Λ୳Γ·͢ɻ ͢Δͱɺେମ0͔Β9·Ͱͷ10 छྨͷύλʔϯʹେ͖͚͘ Δ͜ͱ͕Ͱ͖·͢ɻ
͜ͷΑ͏ ʹσʔλ͚͔ͩΒͦͷنଇੑ ΛֶͼऔΔͷ͕ڭࢣͳֶ͠श Ͱ͢ɻ
ڭࢣֶ͖शͷֶशํ๏(ೖྗ) ೖྗͱɺͦΕʹର͢Δग़ྗ(ਖ਼ղ)ͷϖΞΛͨ͘͞Μ༻ ҙ͢Δ ͨ͘͞Μଟ͚Εଟ͍΄͏͕·͍͕͠1000Ҏ্ ཉ͍͠ →σʔλͷαϯϓϧ͋Γ
ڭࢣֶ͖शͷग़ྗͷදݱ ظ͢Δ݁ՌΛચ͍ग़͠ɺԽ͢Δ ҙຯ͕͋Δ߹ͱ୯ͳΔϥϕϦϯάͷ߹͕͋ Δ ը૾ͷྫͰ͋Εɺ0ʙ9 ϥϕϧͷྫ Έ͔Μ → 1, ΓΜ͝
→ 2, όφφ → 3, …
ࠓճΔ͜ͱ ڭࢣֶ͖शͰੵઇͷ༗ແΛ༧ଌ͢Δɻ ؾிͷؾσʔλ͔Βɺੵઇͷଟ͍ࢁݝͷࢢͷ ؾσʔλΛֶशσʔλͱͯ͠༻ ্هͷؾிͷαΠτͰඞཁͳ߲ΛબΔͷͰ͕͢ɺ ؾԹ ɺੵઇ ɺ෩ ɺ෩ ɺ߱ਫྔ
Λબ͠·ͨ͠ɻ 2004͔Β2015ͷ2݄ɺ3݄ͷσʔλ
CSVσʔλαϯϓϧ μϯϩʔυͨ࣌͠ࠁɿ2016/03/20 20:31:19 ,,,,,,,,,,,,,, ݄࣌,ؾԹ(℃),ؾԹ(℃),ؾԹ(℃),ੵઇ(cm),ੵઇ(cm),ੵઇ(cm),෩(m/s),෩(m/s),෩(m/s),෩(m/s),෩(m/s), ߱ਫྔ(mm),߱ਫྔ(mm),߱ਫྔ(mm) ,,,,,,,,,෩,෩,,,, ,,࣭ใ,ۉ࣭൪߸,,࣭ใ,ۉ࣭൪߸,,࣭ใ,,࣭ใ,ۉ࣭൪߸,,࣭ใ,ۉ࣭൪߸ 2013/2/1 1:00:00,-3.3,8,1,3,8,1,0.4,8,,8,1,0.0,8,1
2013/2/1 2:00:00,-3.7,8,1,3,8,1,0.3,8,,8,1,0.0,8,1 2013/2/1 3:00:00,-4.0,8,1,3,8,1,0.2,8,੩Ժ,8,1,0.0,8,1 2013/2/1 4:00:00,-4.8,8,1,3,8,1,0.9,8,ೆೆ౦,8,1,0.0,8,1
࣮ߦͷྲྀΕ ᶃؾிͷCSVσʔλΛ ಡΈࠐΜͰɺઇ͕ੵΔ ύλʔϯΛֶश ੵઇྔ(cm)Λड͚औΓɺ ੵઇ͕͋Ε̍ɺͳ͚Ε0Λฦ͢ ̍Ϩίʔυ୯ҐͰੵઇϑϥά͕ ཱͭΠϝʔδ ᶄֶ֤शϞσϧͷλΠϓผʹείΞΛ ܭࢉ͠ɺͬͱείΞͷߴ͍
λΠϓͷΦϒδΣΫτΛ Πϯελϯεมʹͱ͓ͬͯ͘. ᶄϦΫΤετ͔ΒૹΒΕ͖ͯͨ ύϥϝʔλΛݩʹࠓ·ͰͷใΛ ݩʹੵઇʹͳΔ͔༧ଌ͢Δ pythonͷγΣϧΛ࣮ߦ
ࠓޙͬͯΈ͍ͨ͜ͱ Ϣʔβͷଐੑੳ هࣄͷϨίϝϯυ →CSVσʔλΛಡΈࠐΜͰɺϥϕϧ͚ͷج४Λॻ ͖͑ΕԠ༻͖͖ͦ͏ ͳͲ
ࢀߟจݙ http://www.slideshare.net/AtsushiKanaya/scikitlearn? next_slideshow=1 http://qiita.com/hiroeorz@github/items/ 997577f0dbbb9460957d