From an infrared microscope with limited software I'm able to obtain an intensity map with a color scale bar including corresponding values. The limited software only provides this map in PNG format. I'm able to read the image into MatLab but I haven't got the know-how to generate a visually similar intensity plot with its corresponding color scale bar (with its values). Could anybody help me on my way with the following image?
Any help would be greatly appreciated.
That looks like your data are on a grid about 11x11 or so, and linearly interpolated between data points. To plot an 11x11 matrix, let's call it M, I think pcolor is the command you're looking for.
pcolor(M) shading interp
And to set the color axis values use caxis:
colorbar caxis([1.180 2.273])