[R] How to rotate an axis?

[Etienne Stockhausen]

Hi everybody,
I'm trying to build a trilineare coordinate system with R. For that, I 
need to rotate an axis. Does anybody know, if it is possible to rotate 
an axis, created with the command axis(), about for instance 60 degrees?

I'm looking foward  to any ideas and hints and want to wish everybody a 
merry merry christmas.

Thanks in advance.

Etienne Stockhausen