Plots return only axes but no curves

Hello, i got a huge problem with the Plotfunctions in Mathematica 9. When i try to plot a defined function it shows just a coordinate system with a white background. When this happens i try to Evaluate[..] the function. A few times this works actually. I’m really frustrated about this issue and would be very happy for help!

Thanks
Steffen

Instead of guessing, it will be easier if you make up a MWE for a case.

But here is one case where no plot shows:

f[t_] := Sin[t]*I;
Plot[f[t], {t, 0, 10}]

But now a plot shows:

f[t_] := Sin[t];
Plot[f[t], {t, 0, 10}]

So you see why.

The possibilites are endless as to why a plot might not display at some point. To get better help please provide a MWE.

Dear Steffen, please provide Mathematica code. Take a few minutes to learn how to make proper posts with this tutorial:

How to type up a post: editor tutorial & general tips

  • especially posting code.