#13754: vertical lines in plot on left and right end
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Reporter: dkrenn | Owner: jason, was
Type: defect | Status: new
Priority: major | Milestone: sage-5.6
Component: graphics | Keywords: plot boundary line
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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In the plot
{{{
plot(sin(3*pi*x)/sin(pi*x), (x,-5,5))
}}}
there are some artifacts at {{{-5}}} and {{{5}}}, namely a straight
vertical line going to the top of the plot. They shouldn't be there. This
also happens plotting the same function in the intervals {{{(-9,9),
(-10,10), (-15,15), (-17,17), (-18,18)}}}. In the plot
{{{
plot(sin(3*pi*x)/sin(pi*x), (x,-7,7))
}}}
something similar occurs, but the line goes down. This also happens for
the interval {{{(-14,14)}}}. For other interval boundaries than the
mentioned (integers from -19 to 19) this does not happen. You can even
mix, e.g. taking an interval {{{(-7,5)}}}.
It also happens using functions {{{sin(m*pi*x)/sin(pi*x)}}} with {{{m}}}
different from {{{3}}} (tested with {{{5}}}).
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13754>
Sage <http://www.sagemath.org>
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