Contour Plot from Coordinates

Right now I have a matrix with x-coordinates, matrix with y-coordinates, and a matrix with pressure values at these points. I'm trying to create a pressure contour plot based on the pressure values at these points, but I cannot seem to figure it out. Could anyone point me in the right direction of how to accomplish this? Any help would be much appreciated!

Answer 1

[Kye Taylor]

I will assume you have three vectors: x, y, and z (where z represents pressure). For example

x = rand(1,100);
y = rand(1,100);
z = x.^2 + y.^2;

Then, you can try

[xi, yi] = meshgrid(...
    linspace(min(x),max(x)),...
    linspace(min(y),max(y)));

zi = griddata(x,y,z, xi,yi);

contour(xi,yi,zi)

[Michael]

Worked great! Thanks for quick response.

[Udit Srivastava]

surely, this worked great. But the contour that I got looks like a quarter of a circle. Can you please tell me how to get a contour like a full circle. Thanks!