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clear
A=[2,3,1,-3,-7;1,2,0,-2,-4;3,-2,8,3,0;2,-3,7,4,3]
B=rref(A) %æ±Açè¡ç®åé¶æ¢¯ç©éµB
[m,n]=size(B);
while B(m,:)==0 %æ±Bçéé¶è¡æ°
m=m-1;
end
m
A =
2 3 1 -3 -7
1 2 0 -2 -4
3 -2 8 3 0
2 -3 7 4 3
B =
1 0 2 0 -2
0 1 -1 0 3
0 0 0 1 4
0 0 0 0 0
m = 3
å³R(A)=3
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