MATLAB: Problem with animated line, not drawing anything

animated lineanimatedlinedrawnowplotplotting

I want to plot the value a metric takes while varying the filter sigma value, the code is as follows:
ImgOrg=imread('ROIOriginal_pgm25.png'); %Load the image
for sigmaVal=0.5:0.1:5
    Imed=imgaussfilt(ImgOrg,sigmaVal); %Apply the filter with the sigma value
    [peaksnr, ~] = psnr(Imed, ImgOrg); %Calculate the metric after applying the filter
    h = animatedline;
    addpoints(h,sigmaVal,peaksnr)
    drawnow limitrate
end
But all I get is an empty figure, I can't see any line or any point. I'm in Matlab R2019a.

Best Answer

Move the
    h = animatedline;
to before the loop.
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