rotating an entire plot

the labels on the axes would also be rotated. of course, i

    > could rotate the plot elements 45 degrees clockwise then
    > rotate the resulting image anticlockwise

It's possible to draw it, but you would have to do all the
transformations/rotations by hand, including drawing the axes as
Line2D instances and labels as Text instances (see for example the
"Scatter3D" example in the archives). There is no easy, built-in, way
to do it, currently. In the planned refactoring of the axis handling,
I'll keep this use-case in mind.