How to highlight a certain pixel when using the imagesc command?

I have a small 3-by-7 matrix which I have plotted using the imagesc() function to get a small map of an area of data.

Is there any way to be able to highlight a certain pixel with a red outline or something similar?

Many thanks!

Answer 1

[Sai Veeramachaneni]

You can use something similar to below code.

imagesc(floor(rand(3,7)*10))
hold on
plot([2.5,2.5,3.5,3.5,2.5],[3.5,2.5,2.5,3.5,3.5],'r','linewidth',3)
hold off

[Daniel Tanner]

Brilliant thank you! That is exactly what I wanted.