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

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Sagar Saxena
Sagar Saxena 2018-3-16
评论： Jan 2018-3-20
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.
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Sagar Saxena
Sagar Saxena 2018-3-16
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
Jan 2018-3-20
In this formula you multiply with the squared norm of Phi, which is a scalar, not a matrix.

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Prajit T R
Prajit T R 2018-3-19
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
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Jan
Jan 2018-3-20
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.

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