How do you create a surf plot in cylindrical coordinates?
显示 更早的评论
In general, the syntax for a surf plot is surf(X,Y,Z). I have u = F(r,z). I'd like to do surface plots of u for multiple cross sections at z = h1, h2, h3, etc. Is there a simple way to create a surf plot in cylindrical coordinates, i.e., something that would be analagous to the syntax: surf(r,phi,u) where u = u(r,h1)?
采纳的回答
Jonathan Epperl
2012-11-19
Or even easier, remember that you're not forced to put just one variable X in the first argument of surf, all you need is a parametrization. So in your case, assume you have vectors r and phi. Then make them into a grid, obtain a matrix with z-values using your function F and just plot:
[R PHI] = meshgrid(r,phi);
Z = F(R,PHI); % which assumes your function is vectorized
surf(R.*cos(PHI), R.*sin(PHI), Z);
更多回答（2 个）
Matt J
2012-11-17
0 个投票
Use TriScatteredInterp to interpolate your data onto a cartesian grid. Then plot using SURF as usual.
Teja Muppirala
2012-11-19
You can use POL2CART to convert the data from r/theta to x/y and then call SURF.
[R,TH] = ndgrid(0:0.1:5,linspace(0,2*pi,41));
F = @(r,th) sin(th).*sinc(1+r);
Z = F(R,TH);
[X,Y] = pol2cart(TH,R);
surf(X,Y,Z);
类别
在 帮助中心 和 File Exchange 中查找有关 Surface and Mesh Plots 的更多信息
2012-11-17
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
