Hi.
How can I plot a 3D surface of the function F(r, theta,z) with 'isosurface'? The cylindrical coordinates are r, theta and z (r is the radius, theta is the angle and z is the axial coordinate)?
A million thanks for your help
MATLAB: Isosurface in cylindrical coordinates
cylindricalisosurface
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contour_at = 0;isosurface(x, y, z, f, contour_at)I tried griddata. Can't figure out why doesn't it work
clc,clear,claload('isosurface_orange.mat');[f,v] = isosurface(xq, yq, zq, vq, level); % extract data
xdata = v(:,1)-max(v(:,1)); % move to origin
ydata = v(:,2)-max(v(:,2))-0.1;[th,rho] = cart2pol(xdata,ydata); % convert to polar/cylindrical system
th0 = linspace(min(th),max(th),100);z0 = linspace(min(v(:,3)),max(v(:,3)),100); [TH0,Z0] = meshgrid(th0,z0);RHO0 = griddata(th,v(:,3),rho,TH0,Z0); % interpolation
% [X0,Y0] = pol2cart(TH0,RHO0);
% patch('faces',f,'vertices',v,'facecolor','g')
plot3(th*180/pi,v(:,3),rho,'.r')hold onsurf(TH0*180/pi,Z0,RHO0,'facecolor','b','edgecolor','none')% surf(X0+max(v(:,1))-30*0,Y0+max(v(:,2))-30*0,Z0,'facecolor','b')
hold offcamlight('headlight');material('dull');axis equal
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