how to create matrix from another matrix?

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]

Answer 1

[Jos Jordan]

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?

[Jos Jordan]

(Assuming you meant it as a 3x3 matrix, not a 3x1 vector of

[123; 
 456; 
 789];

)

[Czarek Czarek]

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]

[Jos Jordan]

B=-A

in that case?

[Czarek Czarek]

no, only first number should be wtich minus

its should looks like this

-1 2 3

-4 5 6

-7 8 9