patch over lines

Darrel Robertson — Fri, 25 Sep 2009 20:08:03 -0400

I have some streamlines and quiver arrows I want to patch over the top of to block out values that are inside my structure. However neither patch nor fill actually get displayed over the top of the lines, even when I specifically tell uistack to place it on top. Is there a simple way to patch over the top of the lines, without resorting to regriding to avoid the structure (which in my case is complex)?

For a simple example:
w=load('wind');
i=10;
u=w.u(:,:,i); v=w.v(:,:,i); x=w.x(:,:,i); y=w.y(:,:,i);
pcolor(x,y,sqrt(u.^2+v.^2));shading('interp');colorbar
hold on;
quiver(x,y,u,v,'w-') % I now have a nice quiver plot
theta=0:pi/8:2*pi;
x2=100+10*sin(theta); y2=40+10*cos(theta); % a circle
h=patch(x2,y2,'k');

If you run this you can still see the quiver arrows which I want to hide behind the circle. I've tried stuff like 'uistack(h,'top')' but I can't seem to cover up the arrows. I also have streamlines and other data and a more complex shape so I don't want to regrid. Any idea how to cover the arrows graphically?

Re: patch over lines

Jerome Briot — Fri, 25 Sep 2009 21:53:01 -0400

Hi,

w=load('wind');
i=10;
u=w.u(:,:,i); v=w.v(:,:,i); x=w.x(:,:,i); y=w.y(:,:,i);
pcolor(x,y,sqrt(u.^2+v.^2));shading('interp');colorbar
hold on;
quiver(x,y,u,v,'w-') % I now have a nice quiver plot
theta=0:pi/8:2*pi;
x2=100+10*sin(theta); y2=40+10*cos(theta); % a circle
z2 = ones(1,numel(theta));
h=patch(x2,y2,z2,'k');

Jerome

Re: patch over lines

Darrel Robertson — Tue, 29 Sep 2009 13:45:17 -0400

Thanks! That was exactly what I needed.

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patch over lines

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