On 03/02/2010 09:21 AM, ma...@mendelu.cz wrote:
Dear sage-support
If I plot 3d graph using
sage: plot3d(sqrt(sin(x)*sin (y)), (x,0,12),(y,0,12) )
the output looks fine. The output of
sage: plot3d(sqrt(sin(x)*sin (y)), (x,0,2*pi),(y,0,2*pi) )
should be different but it is completely wrong (no graph and bounds
for z from 0.00000 to 0.00000156).
The plot for
sage: plot3d(sqrt(sin(x)*sin (y)), (x,0,(2*pi+pi/2)),(y,0,(2*pi+pi/
2)) )
looks fine again. Is it a bug in code for plot3d when determing z-
range? Is it possible to force my z-range to show command?
Many thanks
Robert
Yes, it does look like a bug. I've published a relevant worksheet here:
http://sagenb.org/home/pub/1706. Notice that if you rotate the first
plot so that the positive Z axis is pointing into the screen, you do see
the plot, though the z-range on the plot make it a very funny looking
graph. You'll notice that the worksheet also prints out the evaluations
of the function.
Thanks,
Jason
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