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: a* W a. U" u5 N
>> A=rand(3)
# G3 A* S1 s6 `1 T* q- e6 \a=mean(A,1) %按列平均
- E! ^3 a8 _/ a3 ~b=mean(A,2) %按行平均& j$ `0 q% z2 U/ M% J
c=mean(A(:)) %全部平均8 d5 V! }! K$ Z0 a+ @' e$ v
A =- @2 C( z4 s+ |
0.8134 0.8940 0.2876" h6 V: S% p- e+ U+ u: _& @
0.7185 0.9507 0.9264
7 u$ U, N4 @( W! A9 T. q3 @! O0.5008 0.4624 0.4963
C0 b& r3 U- I9 d: O, V4 la =' B7 q# |6 w) ^1 B8 l
0.6776 0.7690 0.5701
. i) {9 k3 L6 n9 L" p' T/ Lb =4 N& o- K1 Z9 R4 L' Z# H1 V
0.6650
8 v! R' C8 Z4 ~6 m$ N0.8652
& U' R1 z2 c/ Z+ U! h( F* h+ F0.4865
& C' R% P8 @$ M' r$ sc =
$ ~; L- A# M. U0.6722
9 k8 X( U* u& c3 g8 e1 x9 p>> |
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