MATLAB中定义变量的问题？

答案:2 悬赏:0

解决时间 2021-10-13 02:32

提问者网友：锁深秋
2021-10-12 14:07

MATLAB中定义变量的问题？

最佳答案

二级知识专家网友：渊鱼
2021-10-12 14:30

不行的，符号变量不支持数组，以前我也遇到过同样问题。
这样解决行不？
>> sym('[x11 x12 x13 x14;x21 x22 x23 x24;x31 x32 x33 x34;x41 x42 x43 x44]')

ans =

[ x11, x12, x13, x14]
[ x21, x22, x23, x24]
[ x31, x32, x33, x34]
[ x41, x42, x43, x44]

或者这样：
clc;clear
x=[zeros(5,5)]
x=sym(x)
for k=1:5
for m=1:5
x(k,m)=k;
end
end
x

结果：
x =

0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0

x =

[ 0, 0, 0, 0, 0]
[ 0, 0, 0, 0, 0]
[ 0, 0, 0, 0, 0]
[ 0, 0, 0, 0, 0]
[ 0, 0, 0, 0, 0]

x =

[ 1, 1, 1, 1, 1]
[ 2, 2, 2, 2, 2]
[ 3, 3, 3, 3, 3]
[ 4, 4, 4, 4, 4]
[ 5, 5, 5, 5, 5]

全部回答

1楼网友：举杯邀酒敬孤独
2021-10-12 15:23

不行的，符号变量不支持数组，以前我也遇到过同样问题。这样解决行不？ >> sym('[x11 x12 x13 x14;x21 x22 x23 x24;x31 x32 x33 x34;x41 x42 x43 x44]') ans = [ x11, x12, x13, x14] [ x21, x22, x23, x24] [ x31, x32, x33, x34] [ x41, x42, x43, x44] 或者这样： clc;clear x=[zeros(5,5)] x=sym(x) for k=1:5 for m=1:5 x(k,m)=k; end end x 结果： x = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x = [ 0, 0, 0, 0, 0] [ 0, 0, 0, 0, 0] [ 0, 0, 0, 0, 0] [ 0, 0, 0, 0, 0] [ 0, 0, 0, 0, 0] x = [ 1, 1, 1, 1, 1] [ 2, 2, 2, 2, 2] [ 3, 3, 3, 3, 3] [ 4, 4, 4, 4, 4] [ 5, 5, 5, 5, 5]

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