Hello,
I am trying around with some code I found on the web:
ParametricPlot3D[{r Sin[theta], r Cos[theta],
0.01 Sin[7 (4 r - theta)] - 0.1/r, EdgeForm[]}, {r, 0.1,
Sqrt[2]}, {theta, 0, 2 Pi},
PlotRange -> {{-1, 1}, {-1, 1}, {-1, 0}}, PlotPoints -> {50, 360},
Boxed -> False, Axes -> None]
But the output is 'nothing'/empty when I evaluate it. Same if I try to export as a .jpg....but why? Any ideas what is wrong?
Many thanks already.