#3985: Asymptote plotting
----------------------+-----------------------------------------------------
Reporter: kcrisman | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.0.1
Component: graphics | Keywords:
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Old description:
> Plotting functions like 1/x, tan, etc. have asymptotes essentially
> plotted in Sage at this point. This is okay, except that the scale is
> way out of whack, so things look very odd. Sage should either remove the
> asymptote piece of these plots somehow (how is not obvious) or fix the
> ymin and ymax in show so that it just looks like the asymptotes are
> plotted.
> E.g.
> {{{
> sage: plot(tan,-20,20).show(ymin=-5, ymax=5)
> }}}
> except automatic detection of the ymin and ymax.
New description:
Still need improvement on plotting of asymptote of e.g. tan or 1/x,
especially when detect_poles != True. Ideally one has an output similar
to
{{{
sage: plot(tan,-20,20).show(ymin=-5, ymax=5)
}}}
but just straight out of plot.
--
Comment(by kcrisman):
Just FYI, #6035 partially resolves this.
However,
{{{
sage: plot(tan,-20,20, detect_poles='show')
sage: plot(tan,-20,20, detect_poles=True)
}}}
shows that 'show' still keeps the "missing" points (which include not just
the asymptote but also the high slopes on either side) and that True
doesn't create a uniform height as one might desire in the Description.
Description changed to indicate this successful partial resolution,
however!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/3985#comment:3>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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