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Your sample diagram look like spirals to me, other than that the radius might not be increasing linearly.
Use pol2cart() to switch between an (r, theta) form vs (x,y) coordinates.
You say "I have the data for them" so why don't you just use the plot() function and plot them? Am I missing something???
Try this out:
[x,y] = meshgrid(1:150,1:100); [th, rho] = cart2pol(x - 75,y - 50); % convert to polar % spiral centered at (75,50) Img = sin(r/3 + th); imagesc(Img); colormap(hot); axis equal; axis off;