Solving the matrix dimention for expm function

Good afternoon,

I and working in the code bellow. I have an error message Arrays have incompatible sizes for this operation.

time=0:0.01:2*pi;  %time vector 
H=[0 1 0 0 0;1 0 0 0 0;0 0 1 0 1;0 0 0 1 1;0 0 1 1 0]; 
B = [2 ;-2 ];
C=[0.1 + 0.010i;0.2 + 0.0010i; 0.1 + 0.0020i;-0.4 + 0.001i;0.8 - 0.7i];

for k1 = 1:numel(time)
    y(:,k1) = expm(H*time(k1))*C.*B;
end
figure(1)
plot(time,y)
grid

I really appreciate any help and suggestions

[Torsten]

expm(H*time(k1)) is 5x5

C is 5x1,

so expm(H*time(k1))*C is 5x1.

So B had to be 5x1 instead of 2x1.

[Adrian Brown]

Dear @Torsten thank you for your reply. yes that exactly the problem. I am wondering if you have any suggestion how to it.

I changed the size of B to 5x1 but the problem still there as I need to change also C to 5x5.

[Torsten]

If B is 5x1,

y(:,k1) = (expm(H*time(k1))*C).*B

should work.

[Adrian Brown]

@Torsten Really appreciate that from you.