#12676: plot exclude sometimes just connects instead of excluding
------------------------+---------------------------------------------------
Reporter: kcrisman | Owner: jason, was
Type: defect | Status: new
Priority: major | Milestone: sage-5.0
Component: graphics | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
------------------------+---------------------------------------------------
This email on sage-support pretty much says it all.
{{{
I am trying to understand the behaviour of the option exclude in plot()
when a range of values is included.
It looks to me that if a simple range like "exclude=[pi..2*pi]" is used
and the function is defined and real-valued in that range then the end
points and integer points between are excluded from the plot, whilst if
the function is not real-valued in the range, e.g. "sin(x)^cos(x)", then
the whole range is excluded. However, if several ranges are specified
then when the function is real-valued the behaviour is like that for a
single range, whilst if the function is not real-valued then the graph
*is* plotted, incorrectly, for ranges after the first. For example the
graph of "plot(sin(x)^cos(x),(x,0,4*pi),exclude=[pi..2*pi,3*pi..4*pi])"
contains a straight line between 3*pi and 4*pi. Surely this cannot be the
intended behaviour?
}}}
Also, it can even happen for the first range.
{{{
sage: plot(sin(pi*x)^cos(pi*x),(x,0,4),exclude=[pi..2,3..4],ymax=20)
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12676>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
