法向回归 08e--+72--u a2-wuik-6-小 48--小-空--)客--》 a626--e+空-4-》 lexu@mail.xidian.edu.cn 矩阵论 。。。。。10lexu@mail.xidian.edu.cn 矩 阵 论 10 法向回归 ( ) ( ) ( )( ) ( ) ( )( ) ( ) ( ) ( ) ( ) ( ) ( ) n n 2 1 2 i 1i 2 2 i i 1i 2 2 1 1 i 1 i 1 1 n 2 12 1i i i 1i 2 2 i 1 1 nnn 2 1 i 1i 2 1 i i 1i 2 i i 1i 2 2 i 1 i 1 i 1 1 n n 2 1 i i 1i 2 i i 2 i 1 i 1 1 E 2c 2 s ct c t s ct c c 1 c 1 c 2 cc cs t s ct c 1 c 2 cc s ct c c s s ct c t s ct c 1 c 2 c s s ct c t s 1 c = = = = = = = = ∂ = −− + − −− ∂ + + = −− −− +   =   − −− − −− − − +   − = − −+ + ∑ ∑ ∑ ∑∑∑ ∑ ∑ － ( ct c 1i 2 ) 0     − −   =