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トピックモデルによる統計的潜在意味解析 3.2.3 ~ 3.2.4 / topic-model...

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January 07, 2016
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トピックモデルによる統計的潜在意味解析 3.2.3 ~ 3.2.4 / topic-model-3-2-3

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ysekky

January 07, 2016

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Transcript

  1. τϐοΫϞσϧʹΑΔ౷ܭతજࡏҙຯ ղੳ 3ষ ֶशΞϧΰϦζϜ(3.2.3 ~ 3.2.4) Yoshifumi Seki GunosyσʔλϚΠχϯάݚڀձ #98

    2016.01.06

  2. 3.2.3 LDAͷΪϒεαϯϓϦϯά ·ͣLDAͷશ֬཰ม਺ͷ݁߹෼෍Λߟ͑Δ ͔͜͜Βؔ܎ͷͳ͍߲Λফͯ͠αϯϓϧͷੜ੒Λߦ͏

  3. จॻ ʹ͓͚Δ ൪໨ͷજࡏม਺

  4. จॻ ʹ͓͚Δ ൪໨ͷજࡏม਺ ͱͳΔΑ͏ʹਖ਼نԽ͢Δͱ ϙΠϯτ • ෼฼΍৐਺ΛऔΓ෷ͬͯൺྫ஋ʹ͍ͯ͠ΔͷͰ, ૯࿨͕1ʹͳΔΑ͏ʹઃఆ͢Ε͹֬཰஋ʹͰ͖Δ

  5. ͷ৚݅෇͖ಠཱੑ άϥϑΟΧϧϞσϧΑΓ, ͸ ʹͷΈґଘؔ܎͕͋ Δɽ (3.29)͸͜ͷ৚݅Λຬ͍ͨͯ͠Δɽ

  6. ͷαϯϓϦϯά

  7. ͷαϯϓϦϯά Λ༻͍Δͱ • σΟϦΫϨ෼෍ͷࣄޙ෼෍ͳͷͰσΟϦΫϨ෼෍ͷܗʹͳΔΑ͏ʹ͍ͨ͠ɽ • ͳͷͰ૯৐Ͱද͢͜ͱ͕Ͱ͖ΔΑ͏ʹࣜมܗ͍ͯ͠Δ

  8. ͷαϯϓϦϯά (2.11)ΑΓ ͸Dirichelet෼෍ʹै͏ͷͰ

  9. ͷαϯϓϦϯά

  10. ͷαϯϓϦϯά Ҏ্͔Β

  11. ͷαϯϓϦϯά (2.11)ΑΓ ͸Dirichelet෼෍ʹै͏ͷͰ

  12. ΪϒεαϯϓϦϯάʹΑΔಋग़

  13. 3.2.4 LDAͷपลԽΪϒεαϯϓϦϯά ͸จॻ ͰજࡏτϐοΫ ͕ݱΕͨ୯ޠ਺ ͸શจॻʹରͯ͠τϐοΫ ͕୯ޠ ʹରͯ͠ਪఆ͞Εͨؔ਺

  14. ʹ͓͚ΔपลԽ

  15. ʹ͓͚ΔपลԽ ΑΓ

  16. ʹ͓͚ΔपลԽ σΟϦΫϨ෼෍ͳͷͰ, σΟϦΫϨ෼෍ͷظ଴஋ͱͯ͠ܭࢉ͢Δ

  17. None