Question

I have a 50×50 matrix which I am using to plot imagesc plot. I want to be able to show say 5 co-ordinate location on that imagesc with dark circles which mark the location of the wells. How do I do that? Thanks.

Answer 1

Try simply setting the axes limits to the desired values after all plotting is complete:

axis([xmin xmax ymin ymax])

In your case, xmin and ymin would be 0, and xmax and ymax would be size(mat_name,2) and size(mat_name,1) respectively.