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音楽理論と方向統計学の初歩/introduction of circular statisti...
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kur0cky
June 26, 2020
Science
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音楽理論と方向統計学の初歩/introduction of circular statistics and musicology
kur0cky
June 26, 2020
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Transcript
Իָཧͱํ౷ܭֶͷॳา LVSDLZ
ࣗݾհ w 5XJUUFSɿ!LVSDLZ@Z w "HFɿ w ձࣾɿ໊ཧͷೖࣾϲ݄ w ԋɿόΠΦϦϯɼυϥϜ w
͖ͳԻָɿΫϥγοΫɼαΠέτϥϯεɼFUDʜ 2
Իָ
υϨϛϑΝιϥγυ
υϨϛϑΝιϥγυϨϛϑΝιϥγ υϨϛϑΝιϥγυɾɾɾ
ແݶϧʔϓ ʢ॥ʣ
֯ͷσʔλαΠΤϯε
ํ౷ܭֶ
༷ʑͳ॥͢Δσʔλ w ԁप্ɿ֯ w σΟεΫ্ɿ֯ºεΧϥʔ w ٿ໘্ɿ֯º֯ w
γϦϯμʔ্ɿ֯ºεΧϥʔ w τʔϥε্ɿ֯º֯ (0 < r < R) (0 < θ < π) (0 < r) 9 ࠓճԁप্͚ͩΛߟ͑Δ
ํ౷ܭֶ w ֯࣌ؒͳͲɼ॥͢Δʹରͯ֬͠Λߟ͍͑ͨ w هड़౷ܭɼɼݕఆɼϞσϦϯάɼFUD w LVSDLZ͕ձͰൃ͍͢͠Իʁ w ͋Δͷ෩ͷ࣌ܥྻߏͲ͏ͳͬͯΔʁ w
Ԡ༻ w ಈͷӡಈํɼ෩ਫྲྀɼ࣌ؒɼࢠͷೋ໘֯ɼFUD 10
ԁप্ͷهड़౷ܭ
ฏۉํͲͬͪʁ
ฏۉํ ϕΫτϧͷฏۉͰߟ͑Δ ( 1 4 π + 7 4
π)/2 = π 13 º ΦΠϥʔͷެࣜΑΓɼReiθ = 1 N ∑ j eiθj (Rcos¯ θ, Rsin¯ θ) = 1 N ∑ j cosθj , 1 N ∑ j sinθj
ԁप্ͷࢄ 14 ࢄେ ࢄখ
ԁप্ͷࢄ 15 ฏۉϕΫτϧͷ͞ʹண͢Εྑ͍ ࢄɿV = 1 − R ඪ४ภࠩɿsd =
−2 log(R) ඪ४ภࠩͪΐͬͱಛघ ࢄେ ࢄখ
ԁप্ͷ֬
ͷ࡞Γํ w ר͖ࠐΈ๏ɿ֬ີؔΛԁप্ʹר͖ࠐΉ w XSBQQFE$BVDIZ͕༗໊ w ࣹӨ๏ɹɹɿมྔ֬ϕΫτϧΛݪ͔ΒͷڑͰׂΔ w ͖݅๏ɿมྔཱ֬ϕΫτϧΛۃ࠲ඪม͠ɼ֯ΛಘΔ w
ਖ਼نˠWPONJTFT w Ө๏ɹɹɿ ͱͯ֯͠ΛಘΔɽ x = tan(θ/2) 17
WPONJTFT w ผ໊ʮԁप্ͷਖ਼نʯ w ର͔ͭ୯ๆ w ࢦܕ w ݫີʹͷ࠶ੜੑ͕ෆཱ w
w ɿਖ਼نԽఆ w ɿฏۉํύϥϝʔλ w ɿूதύϥϝʔλ f(θ; μ, κ) = Ceκ cos(θ−μ) C μ κ 18
ޒݍ
ޒݍ DJSDMFPGUI w ԻఔͰͳ͘ɼௐ LFZ ͷྠ w ֎ଆ͕ϝδϟʔɼଆ͕ϚΠφʔ w ྡΓ߹͏ௐه߸
̅ ̆ ͕ͭҟͳΔ w Ұप͢Δͱ·ͨͬͯ͘Δ 20
ޒݍͷར༻ w εϦʔίʔυ͕Θ͔Γ͍͢ w جຊͷίʔυ͔Β྆αΠυΛݟΕྑ͍ w ࠨճΓ͍ͯ͘͠ͱࣗવͳίʔυʹͳͬͯΔ w πʔϑΝΠϒϫϯ͕؆୯ʹͰ͖Δ w
KB[[ͳͲͰڧ͍ 21
DBTFTUVEZ ࡞ۂՈ͝ͱͷ࡞ۂ
σʔλ֓ཁ 23 w ༗໊࡞ۂՈͷۂใϦετ w ࡞൪߸ɼλΠτϧɼௐɼ࡞ۂɼδϟϯϧɼฤ w ιʔεɿແྉָේͷϥΠϒϥϦʔ*.4-1͔ΒεΫϨΠϐϯά ໘ന͍σʔληοτʹͳΓͦ͏ͳͷͰɼγΣΞͯ͠ੳ͠·ͤΜ͔ʁস https://imslp.org/wiki/Main_Page
༗໊ͳ࡞ۂՈΛൈਮɽ͕$NBKPS
ϝϯσϧεκʔϯϞʔπΝϧτͷӨڹΛଟʹड͚͍ͯΔΒ͍͠ ٕܥϐΞϊ࡞ۂՈࣗ༝͕ߴͦ͏ɽࣅͯΔ
.BSEJB8BUTPO8IFFMFSݕఆ w ԁप্ͷͭͷ͕ҟͳΔ͔ͷϊϯύϥϝτϦοΫݕఆ w 6ݕఆͷDJSDVMBS֦ு w ܈ͷσʔλΛִࠞͥͯؒʹฒΔɽؼແԾઆͷͱQΛܭࢉ w ݁Ռ 26
Q ݁Ռ NP[BSUWTNFOEFMTTPIO غ٫ DIPQJOWTMJTU[ غ٫Ͱ͖ͳ͍
·ͱΊ w Իָͱ૬ੑ͕ྑ͍ͱࢥΘΕΔํ౷ܭֶʹ͍ͭͯɼͦͷॳาͷ ॳาΛհͨ͠ w ௐ߸ͷଆ໘͔Βɼ࡞ۂΛੳͨ͠ɽಛʹɼϦετͱγϣύ ϯͷޒݍͷҟͳΔͱݴ͑ͳ͔ͬͨɽ 27
͓͢͢Ίจݙ w +BNNBMBNBEBLB 43 4FOHVQUB " 5PQJDTJODJSDVMBS TUBUJTUJDT 7PM
XPSMETDJFOUJpD w όΠϒϧతͳɼํ౷ܭͷ༗໊ςΩετ w ਗ਼ਫ ʰ֯σʔλͷϞσϦϯά *4.γϦʔζਐԽ͢Δ౷ܭཧ ʱ ۙ Պֶࣾ w ํ౷ܭͰ͍͠ॻ w 7BMEF[ %/ 45"5*45*$4*/.64*$0-0(: w Իָº౷ܭͷຊ 28