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>> A=rand(3)
" N9 K& B# a2 Q1 V: ba=mean(A,1) %按列平均
) D4 U) V+ v/ J, {& s# D3 Yb=mean(A,2) %按行平均) L o0 R. N4 {. g9 ?0 N) D
c=mean(A(: )) %全部平均3 ]% k3 j+ h, H% B9 m4 l
A =
# s: O0 X% U7 s9 B0.8134 0.8940 0.2876
1 @; G8 G8 D* @7 K; e0.7185 0.9507 0.9264
3 b9 n |5 A; f) C% F/ V- L0.5008 0.4624 0.4963
3 [. N! P0 @8 N0 ]: B8 J6 ^; ka =& Y9 d4 e# h" H4 ?- j
0.6776 0.7690 0.5701
, l* G) Z. Z8 V! ~0 xb =
% x" F& |2 L4 ^; C5 D0.6650* e, C& r& ?6 y! p
0.86521 A, X g& v- \5 q# o
0.48653 I2 D5 l; c, X" q" T
c =% ?! ` N' B0 Z- ^' H" C& k, c) R
0.6722 |
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