how to do a 3d polar plot

>>>>> "berkeleylab" == berkeleylab  <berkeleylab at hotmail.com> writes:

    berkeleylab> I want to make a 3d plot and using r and phi as variable.?

    berkeleylab> I can try to plot with

    berkeleylab> plot3d(ev(f(r,phi),r=sqrt(x^2+y^2),phi=atan2(x,y),[x,x1,x2],[y,y1,y2]);

Did you read the documentation for plot3d?  There are examples there
to use cylindrical and spherical coordinates.  Perhaps you want
cylindrical coordinates?

Ray