How do I multiply two variables of form A(:,:, i) and B(:,:,i) where i = 20

SO basically , I need the product of these 2 variables for 20 iterations and then add the products. I tried using * and .* but that doesn't work.

[James Tursa]

Please give us the code you are trying, and tell us what size(A) and size(B) are.

[Sagar Saxena]

Could you plese help me to formulate this equation in matlab, rest I can figure out. Please see the attached image. I am just trying to plot the point spread function.

[Jan]

In this formula you multiply with the squared norm of Phi, which is a scalar, not a matrix.

Answer 1

[Prajit T R]

Hi Sagar

Try this code:

 sum=0
 for i=1:20
    sum=sum+s(:,:,i).*(phi(:,:,i).^2)
 end

It will work if the sizes of A and B match.

Cheers

[Jan]

Using "sum" as variable causes troubles frequently, because the builtin function sum() is not available afterwards. Better avoid shadowing of builtin functions by using different names.