#5553: allow vertical vectors in vector field plots
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Reporter: kcrisman | Owner: was
Type: defect | Status: new
Priority: minor | Milestone: sage-3.4.2
Component: graphics | Keywords:
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This is a followup to #4104, where the following discussion occurs about
slope/vector field plots:
joyner: A question for possibly a future patch: it will not plot
{{{
plot_slope_field(x/y, (x,-3,3), (y,-3,3)).show(aspect_ratio=1)
}}}
because of the problem at y=0. However, should it? A slope of plus or
minus infinity has a well-defined meaning. Should one try to trap
singularities like that and just plot them as vertical direction fields in
the future?
jason: I'm aware of the problem, but decided to post the patch anyway
when I saw that plot_vector_field had the same problem: the plot is blank
when an evaluation is undefined. I thought about trapping these things
and plotting them as vertical lines, but really we ought to do something
in plot_vector_field to take care of things when a vector has an infinite
or NaN coordinate. I ran out of time to fix plot_vector_field.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5553>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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