#11787: error in creating graphics with numpy arrays
-----------------------------------------+----------------------------------
Reporter: jason | Owner: jason, was
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.9
Component: graphics | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers: Luis Felipe Tabera
Alonso
Authors: Punarbasu Purkayastha | Merged in:
Dependencies: | Stopgaps:
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Comment (by ppurka):
Replying to [comment:8 lftabera]:
> The following test now provides an empty graphics
>
> list_plot([1, I, pi + I/2, CC(.25, .25)])
Yikes! I learn something new everyday. I tried to avoid creating yet
another list internally in the function by using `enumerate`. But this is
an iterator and it runs through to the end of the list on one of the calls
to `line` or `point`. And then if an exception is raised from those
functions, then the list appears empty while trying the CC plots.
>
> I would try to avoid, if possible, the import of ndarray and testing for
lists, tuples etc. It seems that line and plot can deal with ndarrays and
ndarrays of ndarrays without problem.
Indeed line and point can handle ndarrays. But the main problem is to
detect when an empty array is passed in. Both those functions can not
handle an empty numpy array. All this error checking was just to handle
empty arrays :-|
{{{
sage: line(np.array([]))
...
ValueError: there must be at least 2 points
sage: line([]) # this is fine
sage: point([]) # this is fine
sage: point(np.array([]))
...
AttributeError: 'int' object has no attribute '_set_extra_kwds'
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11787#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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