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Abesuccess
[专家分：0] 发布于 2008-03-31 20:08:00
>> j=[2 4 3 7 2 5 1 8];
>> s=[8 1 0 5 1 2 4 3];
>> X=diag(s,-2)
X =
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
8 0 0 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 5 0 0 0 0 0 0
0 0 0 0 1 0 0 0 0 0
0 0 0 0 0 2 0 0 0 0
0 0 0 0 0 0 4 0 0 0
0 0 0 0 0 0 0 3 0 0
>> X=diag(s,-2)
X =
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
8 0 0 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 5 0 0 0 0 0 0
0 0 0 0 1 0 0 0 0 0
0 0 0 0 0 2 0 0 0 0
0 0 0 0 0 0 4 0 0 0
0 0 0 0 0 0 0 3 0 0
>> S=sparse(X)
S =
(3,1) 8
(4,2) 1
(6,4) 5
(7,5) 1
(8,6) 2
(9,7) 4
(10,8) 3
>> s(6,1)=6;
s(4,2)=4;
s(5,3)=35;
s(6,2)=24;
s(2,3)=18;
s(1,7)=54;
s(3,8)=29;
>> full(s)
ans =
8 1 0 5 1 2 54 3
0 0 18 0 0 0 0 0
0 0 0 0 0 0 0 29
0 4 0 0 0 0 0 0
0 0 35 0 0 0 0 0
6 24 0 0 0 0 0 0
>> S(14,36)=19;
S(22,44)=97;
S(357,129)=45;
>> I=find(S)
I =
3
361
1077
1435
1793
2151
2509
12509
15373
46053
请问最后find函数出来的那些数代表什么意思？我看不懂，请高手指点！！！谢谢！