P D H 2 log ∑ − = ଓؔ Pi ɿ σʔλD தͰͷଓؔi ͷׂ߹ { ׂޙͷΤϯτϩϐʔʢׂ2ͷ߹ʣ |Di | ɿ σʔλDi ͷσʔλͷݸ H(D 0 ) H(D1 ) H(D2 ) D0ɿ ׂલͷσʔλ ( ) ( ) ( ) 2 0 2 1 0 1 2 1 D H D D D H D D D D H + = +
( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) { } i V i N i V i N i V i V i PT i C S C S C S C S C S C S C S C Sim 2 2 1 1 2 1 × × × × × × = ( ) ( ) ( ) ( ) ( ) ( ) { } 2 2 2 2 1 1 i V i N i V i N i PT i C S C S C S C S C S C Sim × × × × =