Outline of shape in matrix using contour?

Hi all!

I have a matrix with various shapes. The matrix looks something like this (picture included below) when I use the imshow command. I was wondering if anyone knew how to outline the shapes so that only the outline of the shape (i.e. the boundaries) appears. I tried using contourf, and it works, but this flips the image upside down. Any other options?

I have included some code for reference:

shape = ncread(file, 'shape', [1,1,1,612,1], [inf, inf, inf, 1, inf])
imshow(shape)
contourf(shape)

Thanks in advance!

Answer 1

[Star Strider]

Try this:

figure
contourf(shape)
set(gca, 'YDir','reverse')
axis('equal')

That should fiip it right-side-up.

[Michelle De Luna]

@Star Strider: This is exactly what I was hoping for! You're the best. Thank you very much! Please stay safe and take care. :)

[Star Strider]

As always, my pleasure!

I very much appreciate your compliment! You, too!