On Sep 23, 2:05 pm, John H Palmieri <[EMAIL PROTECTED]> wrote:
> When passing a python function to plot3d, specifying the variable
> names and including 'adaptive=True' makes plot3d fail, with the
> message
>
> AttributeError: 'function' object has no attribute 'subs'
>
> In more detail:
>
> sage: def f(x,y): return sin(x+y)
>
> Then the following work and produce the same graph:
> plot3d(f, (x, -5, 5), (y, -5, 5))
> plot3d(f, (-5, 5), (-5, 5))
Let me clarify: the first of these fails unless I do var('x y'). After
executing that, the first works, producing the same picture as the
second.
> On the other hand,
> plot3d(f, (-5, 5), (-5, 5), adaptive=True)
> works, but
> plot3d(f, (x, -5, 5), (y, -5, 5), adaptive=True)
> barfs with the error message given above.
>
> Is this a bug, or is this related to one of the issues raised in this
> earlier thread
> <http://groups.google.com/group/sage-support/browse_frm/thread/
> 9ad07eeddb850ab3/e0cab1daca9b0883?lnk=gst&q=plot3d#e0cab1daca9b0883> ?
>
> If it's not a bug, it should perhaps fail more gracefully, since the
> plot works if 'adaptive=False'.
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