Contour plot of polar coordinates

i have a 189*189 matrix which gives me a vector field in r and theta. I want a contour plot of that matrix. Any help would be greatly appreciated!

Answer 1

[Birdman]

Try the following. I transformed the polar coordinates to cartesian coordinates and then obtained a contour polar plot.

load('theta.mat');
load('r.mat');
% Convert to Cartesian
x = r.*cos(theta);
y = r.*sin(theta);
z = r-theta;
h = polar(x,y);
hold on;
contourf(x,y,z);

[Yigit Ozbas]

I tried something similar and found my mistake and now it finally works. Thanks for your help.

[Birdman]

You're welcome.

Answer 2

[erhamah alsuwaidi]

why did you define z=r-theta?