Delete patch in Matlab

I have created a square and patch it in matlab. now I want to make a circular hole in that square patch. How can I do it? Is it possible to delete a small area from a bigger patch?

[Rik]

As far as I'm aware it is not possible to remove part of a patch, you can create a new patch object that does not include the hole.

Answer 1

[Rik]

Here is an example of what I wrote in my comment:

t=linspace(0,2*pi,200);
x=sin(t);y=cos(t);

x=[x 0 0 2  2 -2 -2 0 0];
y=[y 1 2 2 -2 -2  2 2 1];
patch(x,y,[0 1 0],'EdgeColor','none')
daspect([1 1 1])
axis([-3 3 -3 3])

if you don't turn the edge off, you will see the seem. If you want to have an edge you can add a second and third patch with no face color and only the edge of the square and the circle.