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ロジスティック回帰

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 ロジスティック回帰

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Taichi Aida

March 21, 2019
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  1.  vyuImn a 7 3 535 7 : 13 roIc

    s jhipw d b e I/0- - 55 .51 6 - A 5Vtl L 7 A 5 A 1D 1 3 5 4 I Ni jhip gk 7 :5 6 6 7 2 2 6 1 137 5 51 6
  2.  • 4 !" # • # 004 • $

    1 004 2 • % • !" # = %# #'7 1 ,7 2 0 4 • %#' ≥ 0 $ = 1 • %#' < 0 $ = 0 • %
  3.  • 2 4 !" # • !" # =

    1 1 + exp(−",#) 0 < !" # < 1 • 9 4
  4.  • 1 ! "#$ % &(((") = 1|-).(/)&(((") =

    0|-)$1.(/) • • ((") = 1 &(((") = 0|-)$1.(/) = 1 • ((") = 0 &(((") = 1|-).(/) = 1
  5.    • • !(#) 3 1 ! #

    = & '() * +(,(') = 1|/)0(1)+(,(') = 0|/))30(1) • 3 log! # = 7 '() * ,(')log+ ,(') = 1 / + (1 − ,('))log+(,(') = 0|/) • 3 3 3
  6.    • !" # = %('(() = 1|#)

    1 ,- .log2 , .,- = 3 (45 6 '(() − !" # 8- • 1 14 ,- ≔ ,- − : 3 (45 6 !" # − '(() 8- • : • ≔
  7.    • !" # = %('(() = 1|#)

    1 ,- .log2 , .,- = 3 (45 6 '(() − !" # 8- • 2 ,- ≔ ,- − : 3 (45 6 !" # − '(() 8- • : • ≔ 5 !" # = %('(() = 1|#)2 % ' ( = 0 # = 1 − !" # <=>?@ A <AB = <=>?@ A <C" # <C" # <AB
  8.  • l T ! h m A "# n

    r • !$"# ≥ 0 d ' = 1 • !$"# < 0 d ' = 0 • o c T • ! g_k • ep • a bi 0::7 /1:0 1 01 1- 3 :.8 0 7 7