Gaussian envelope on the diagonal of a matrix

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FlyGuy
FlyGuy 2020-9-26
回答： Bjorn Gustavsson 2020-9-26
I want to create a matrix that on its diagonal appears a Gaussian envelope. In other words, I want the Gaussian of some width sigma to be peaked at the diagonal of the matrix (say 1 is the peak value of the Gaussian I want to use, so I'm looking to have 1 on all of the diagonal elements of the matrix and smaller values on the off diagonal elements).
Any ideas on how to do this?

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Bjorn Gustavsson
Bjorn Gustavsson 2020-9-26
Something like this:
[x,y] = meshgrid(0:32);
M = exp(-(x-y).^2/4^2);
imagesc(x(1,:),y(:,1),M)
Adjust width as you see fit.
HTH

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