Problem in Plotting

Questions
,
1

I have another problem for plotting anything, the Output of plotting is “-Graphics-” or for 3d plotting is “-Graphics3D-” insted of plot curve or function or data or … .
for example:

In[1]:= Plot[Sin[x], {x, 0, 6 Pi}]
Out[1]= -Graphics-

In[2]:= Plot3D[Sin[x + y^2], {x, -3, 3}, {y, -2, 2}]
Out[2]= -Graphics3D-

Do i need activate package or not? What do i do?

Best,
Vahid

2

Please see this article which describes this issue:

http://support.wolfram.com/kb/3590

3

This also happens if you are using the Mathematica Kernel directly, instead of the main Mathematica gui.

If you want to run the kernel directly, graphics can still be displayed.
See http://support.wolfram.com/kb/3545 .