Plot a 2D Gaussian prior

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Dave Mansfield
Dave Mansfield on 27 May 2022
Commented: Dave Mansfield on 27 May 2022
Hi
So i want to get a heatmap / contour plot of a gaussian prior - before any data has been collected. So essetially im just plotting a 2D covarience funtion. I feel like this should be easy but im going mad trying to sort it out. Does anyone have any ideas where to start?

Accepted Answer

Paul
Paul on 27 May 2022
Something like this?
mu = [1 1];
Sigma = [1 .7*1*sqrt(2); .7*1*sqrt(2) 2];
[X,Y] = meshgrid(-2:.1:4);
p = mvnpdf([X(:) Y(:)],mu,Sigma);
p = reshape(p,size(X));
pcolor(X,Y,p),shading interp
  1 Comment
Dave Mansfield
Dave Mansfield on 27 May 2022
yeah somthing along those lines, this is definitly a good starting point. Thank you

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More Answers (1)

Image Analyst
Image Analyst on 27 May 2022
Maybe this:
arrayWidth = 500;
sigma = 80; % Standard deviation.
g = fspecial("gaussian", arrayWidth, sigma); % Create Gaussian matrix.
imshow(g, []);
axis('on', 'image')

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