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From: bluedevil.knight on 29 Jul 2010 13:20
I want to plot a surf plot of a matrix of data I have in polar coordinates.

So for instance:
theta=[0 .1 .2 .3];
r=[1 2 3 4];
data=[1 2 3 4;5 6 7 8;9 10 11 12; 13 14 15 16];

Obviously I could plot it using surf(theta,r,data)
but the coordinate system is wrong. I want something like polar3d. I tried polar3d at the download site, but that assumes the spacing between theta and r variables is identical, but in my case it is .1 for theta and 1 for r.

Any ideas?
From: bluedevil.knight on 30 Jul 2010 07:52
Bumping...

I want to plot a surf plot of a matrix of data I have in polar coordinates.

So for instance:
theta=[0 .1 .2 .3];
r=[1 2 3 4];
data=[1 2 3 4;5 6 7 8;9 10 11 12; 13 14 15 16];

Obviously I could plot it using surf(theta,r,data)
but the coordinate system is wrong. I want something like polar3d. I tried polar3d at the download site, but that assumes the spacing between theta and r variables is identical, but in my case it is .1 for theta and 1 for r.
From: Sean on 30 Jul 2010 13:30
"bluedevil.knight" <bluedevil.knight(a)yahoo.com> wrote in message <2077428284.25155.1280438483980.JavaMail.root(a)gallium.mathforum.org>...
> I want to plot a surf plot of a matrix of data I have in polar coordinates.
>
> So for instance:
> theta=[0 .1 .2 .3];
> r=[1 2 3 4];
> data=[1 2 3 4;5 6 7 8;9 10 11 12; 13 14 15 16];
>
> Obviously I could plot it using surf(theta,r,data)
> but the coordinate system is wrong. I want something like polar3d. I tried polar3d at the download site, but that assumes the spacing between theta and r variables is identical, but in my case it is .1 for theta and 1 for r.
>
> Any ideas?

You could use pol2cart() and then surf.
From: bluedevil.knight on 2 Aug 2010 07:22
Cool, found the solution here:
http://geology.wlu.edu/connors/primers/Surfaces_and_Grids_in_Matlab/Surfaces_and_Grids_in_Matlab.htm
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