how to create matrix from another matrix?

2021 2 6
1 个回答
更新时间：2021 2 6
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I need to use a matrix A to create a matrix B
matrix a
A=[123;456;789]
matrix b
B=[1+2i 2+3i 3+4i;4+5i 5+6i 6+7i;7+8i 8+9i 9+10i]

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回答（1 个）

Jos Jordan
Jos Jordan 2021-2-6

0 个投票

I'm not sure exactly how you are expecting this to be done, but you could simply just do:
A = [1,2,3;4,5,6;7,8,9];
A_imaginary = [2*i,3*i,4*1;5*i,6*1,7*i;8*i,9*i,10*i];
B = A + A_imaginary;
if that's all you needed to do?

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Jos Jordan
Jos Jordan 2021-2-6
编辑：Jos Jordan 2021-2-6
(Assuming you meant it as a 3x3 matrix, not a 3x1 vector of
[123;
456;
789];
)
Czarek Czarek
Czarek Czarek 2021-2-6
hmm, maybe the next example will be easier
matrix A
A=[123;456;789]
and i need somehow change matrix A with command to creat matrix B, and matrix B should looks like this
B=[-123;-456;-789]
Czarek Czarek
Czarek Czarek 2021-2-6
no, only first number should be wtich minus
its should looks like this
-1 2 3
-4 5 6
-7 8 9

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