[IPython-dev] changing plotting backend

[Vasco Tenner]

Hi,
when I open a new ipython shell (master), withouth any flags, I can set 
the plotting backend by:
 > %matplotlib wx
Or
 > %matplotlib gtk

However, I cannot change it halfway my session:
 > %matplotlib wx

 > %matplotlib gtk
Warning: Cannot change to a different GUI toolkit: qt. Using wx instead.

If I start the ipython notebook server, I can only use tk. In the first 
cell of a new notebook:

%matplotlib wx
Warning: Cannot change to a different GUI toolkit: wx. Using tk instead.

Is there a way to change the plotting backend in an ipython notebook to 
something else then tk or inline?

Kind regards,
Vasco