... i M iji M iLjiixpyxpxpxpXH∑∑∑ == = = = )( log ), ( )( log) () ( 2 111 2 jLjji M iLjjjypyxpypypYH∑∑∑ == = = = ∑∑ == + =+ ⇒ M iLjjijiypxpyxpYHXH11 22 ] )( log) () [ log, () ( )( ∑∑ == =+ ⇒ M iLjjijiypxpyxpYHXH11 2 ] )( ) () [ log, () ( )( ... H(Y) = H(0. 12 5, 0 .2 5, 0. 625 ) = 1.3 (bit) Entropy của Y khi biết X H(Y/X= 1) = H(0 .2 5, 0.5 , 0 .25 )= 1.5 (bit) H(Y/X =2 )= H( 0, 0, 1 )= 0 H(Y/X )= p( X=1)H(Y/X= 1)+ p( X = 2) H(Y/X = 2) = 0.75 (bit) ... P( X,Y) X,Y X=0,Y=0 X=0,Y=1 X=0,Y =2 X=1,Y=0 X=1,Y=1 X=1,Y =2 P( X,Y) 0. 125 0 .25 0. 125 0. 125 0 .25 0. 125 - H(X,Y) =H(0. 12 5, 0 .2 5, 0. 12 5, 0. 12 5, 0 .2 5, 0. 125 ) =2 .5 (Bit) Định nghĩa Entropy có điều...