Interesting. Just to double-check, when you say that it only happens for
the "agg" backend, are you saying that backends like "tkagg" are
unaffected? I think at this point there is enough information here to file
a bug report.
Ben Root
On Mon, Dec 8, 2014 at 6:14 PM, Ryan Nelson <rnelsonc...@gmail.com> wrote:
> Final update.
>
> I've done some more searching, and found a couple more things. It seems
> that this problem occurs with the backend set to "Agg"
> (`matplotlib.use("agg")), so it isn't related to the interactive backends.
> In addition, the problem does not occur with a random Polygon object added
> to an axes; however, I do see the problem when the same polygon is added to
> the axes as a PolyCollection. See code below.
>
> Ryan
>
> #####
> import numpy as np
> import matplotlib
> matplotlib.use("Agg")
> import matplotlib.pyplot as plt
> from matplotlib.collections import PolyCollection
>
> x = np.linspace(0, np.pi*2, 1000)
> y = np.sin(x)
>
> ax = plt.axes()
> data =np.array([(0,0), (1,0), (1,1), (0,1)])
>
> # These three lines work fine.
> poly = plt.Polygon(data)
> poly.set_linewidth(0)
> ax.add_patch(poly)
>
> # Comment out the three lines above
> # Uncomment next three lines, does not work.
> #col = PolyCollection([data])
> #col.set_linewidth(0.0)
> #ax.add_collection(col)
>
> plt.axis([-2, 2, -2, 2])
> plt.savefig('junk')
> #####
>
> On Mon, Dec 8, 2014 at 5:02 PM, Ryan Nelson <rnelsonc...@gmail.com> wrote:
>
>> Update 2.
>>
>> I made a new Anaconda Python 2.7 environment and cycled through some
>> different MPL versions. Everything works as I would expect in 1.4.0;
>> however, moving to 1.4.1 is when the problem occurs. I see this same
>> problem if I do the OO commands instead of pyplot.
>>
>> import numpy as np
>> import matplotlib.pyplot as plt
>>
>> x = np.linspace(0, np.pi*2, 1000)
>> y = np.sin(x)
>>
>> ax = plt.axes()
>> fill = ax.fill_between(x, y-0.1, y+0.1)
>> fill.set_linewidth(0)
>>
>> plt.show()
>>
>> On Mon, Dec 8, 2014 at 3:38 PM, Ryan Nelson <rnelsonc...@gmail.com>
>> wrote:
>>
>>> Update.
>>>
>>> This is a problem also in Anaconda Py3.4 with MPL 1.4.2, but it works
>>> without a problem on MPL 1.4.0.
>>>
>>> Ryan
>>>
>>> On Mon, Dec 8, 2014 at 12:15 PM, Ryan Nelson <rnelsonc...@gmail.com>
>>> wrote:
>>>
>>>> Hello all,
>>>>
>>>> I'm having an issue with fill_between. It seems that setting the
>>>> keyword `linewidth=0` removes the entire patch, rather than the just the
>>>> bounding lines. Example:
>>>>
>>>> ####
>>>> import numpy as np
>>>> import matplotlib.pyplot as plt
>>>>
>>>> x = np.linspace(0, 2*np.pi, 1000)
>>>> y = np.sin(x)
>>>>
>>>> plt.fill_between(x, y-0.1, y+0.1, linewidth=0) # Setting this !=0 works
>>>> fine
>>>> plt.plot(x, y, 'k')
>>>> plt.show()
>>>> ####
>>>>
>>>> I'm using MPL version 1.4.2 on Python 2.7.8 (Gentoo Linux). This used
>>>> to work fine before, but maybe there is a new way to do what...
>>>>
>>>> Thanks
>>>>
>>>> Ryan
>>>>
>>>>
>>>>
>>>
>>
>
>
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