transform_xy error: value NIL is not of type DOUBLE-FLOAT

>>>>> "Adrian" == Adrian Brown <abrown at seti.org> writes:

    Adrian> Hi Ray,
    Adrian> I initially discovered the problem with a more complex (and important
    Adrian> to me) function involving sqrts of cos and sin, and I subsequently
    Adrian> simplified the problem down to the simplest function I could find that
    Adrian> reproduced the bug.

    Adrian> The bug has been filed as #2579.

Thanks.

I'll have to look at the code, but what might happen is that plot3d
will just plot the realpart of the functions.  That still leaves you
with the task of figuring out what you really want plotted and whether
the realpart is the right part.

Ray