Pcolor: Draw a square around (highlight) a single pixel

I would like to draw a square around a single pixel to emphasize it. I envision something like the default grid of pcolor, but only around a single pixel. Is this possible, or are there other ways to draw the eye to a single position on a pcolor grid?

Answer 1

[Image Analyst]

You might try this:

http://www.mathworks.com/matlabcentral/fileexchange/32273-im2html-m

Otherwise, just write into the columns and rows like you'd expect

yourImage(row-1:row+1, column - 1) = 255; % Left edge
yourImage(row-1:row+1, column + 1) = 255; % Right edge
yourImage(row-1, column) = 255; % Top edge
yourImage(row+1, column) = 255; % Bottom edge

[Edward]

Thank you for your prompt response. This is pretty much what I would like to do, but I was hoping to not have to change the image matrix C itself.

In my application, the C matrix is only ~30 by 20, so this approach would really impose itself on the presentation of the data.

[Image Analyst]

You can use plot() or line() to plot lines in the overlay above the image.