On Sunday, January 21, 2018 at 7:02:24 PM UTC, William wrote:
>
>
> On Sun, Jan 21, 2018 at 9:01 AM Simon Willerton <s.wil...@sheffield.ac.uk
> <javascript:>> wrote:
>
>> Hi!
>>
>> There seems to be a bug in the plotting in the Jupyter notebook. The
>> following piecewise defined function should be smooth at r=1 but the plot
>> is not; the first part of the plot seems to be lifted slightly. I noticed
>> this in a more complicated example but this is a reasonably minimal case.
>>
>> r = var('r')
>> plot(2*r - r^2, r, 0, 1) + plot(1, r, 1, 2)
>>
>> This bug doesn't seem to occur in CoCalc .sagews notebook but does occur
>> in SageMath Kernels 7.6, 8.0, 8.1 in a CoCalc Jupyter notebook and offline
>> on my Mac OS X Sierra in a Jupyter notebook.
>>
>
> It could be an issue with svg versus png output.
>
>
>>
>> Cheers,
>>
>> Simon.
>>
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> --
> -- William Stein
>
Indeed, that seems to be the problem. Comparing the output from the
following code gives the svg as smooth but the png not smooth.
p = plot(2*r- r^2, r, 0,1) + plot(1, r, 1, 2)
p.save("plot.svg")
p.save("plot.png")
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