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>> A=rand(3) J+ l% [' K2 @; X0 ?) a
a=mean(A,1) %按列平均' U) `8 W* U7 w H2 a. |& Z5 s
b=mean(A,2) %按行平均9 y+ r3 K$ N9 Z( R& F. L
c=mean(A(: )) %全部平均5 R/ \" X& |. h6 [" ^3 C% ]
A =
3 |7 F3 R% v5 @' I$ ?: i0.8134 0.8940 0.2876
8 ]7 ?- U6 t6 m5 ^* e* F0.7185 0.9507 0.9264
( T9 ~; x% D5 _, C0.5008 0.4624 0.4963
, I5 Z1 P* r1 K Ba =
6 k0 {7 R. v& a+ Q1 E1 ~- ~( C/ U0.6776 0.7690 0.5701! d/ w! t% a, L. ?9 i
b =
9 O1 j& C9 [! P3 u0.66503 w) m9 |3 j9 b% R7 ^
0.8652
D. U: Y+ p5 i8 z. Y9 {0.4865
' [6 l/ D3 A6 ~" }" g% a8 ec =$ }9 W4 V5 r& {
0.6722& h8 m- T- z( i0 I5 [
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