help me to type this eq in MATLAB script
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help me to type this eq(file attached) in MATLAB script
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1157688/image.png)
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Image Analyst
am 15 Okt. 2022
It's not clear what your variable names are, how many dimensions they have, and what variable (i or r) is in each dimension, probably because you didn't read the community Guidelines before posting. But here is a stab at it:
denominator = sum(xw(:, r) .* alpha(:, r) .^ N);
xD(r) = xw(:, r) ./ denominator
If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:
1 Kommentar
Walter Roberson
am 15 Okt. 2022
If
is a row vector of length C and α is a 2D array that is C by something, then you could save on the explicit sum by using
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1157963/image.png)
xd = xw ./ (xw * alpha.^N)
where * is the matrix multiplication operation.
but for the sizes to work out properly, alpha would have to turn out to be square
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