[SciPy-User] why scipy.special.mathieu_cem is not periodic?

[David Goldsmith]

But you are now seeing periodicity?  Visual comparison can be "tricky":
output numerical results from each at common abscissae to, e.g., CSV files,
and then import them into a spreadsheet and then look at the differences
that way.  (I imagine such detailed verification of a problem will be
required before a ticket would be accepted, unless someone else is
concerned enough to independently verify the problem.  In other words,
people are probably going to want to see that you've done "due diligence"
before pursuing this.  But i could be wrong...)

DLG

On Tue, Apr 25, 2017 at 5:23 PM Ming Lu <hiluming at gmail.com> wrote:

> The period seems more in scipy than in mathematica, even after
> converting to degrees.
>
> On 4/26/17, David Goldsmith <eulergaussriemann at gmail.com> wrote:
> > Did you see the answer on stackoverflow?
> >
> > DLG
> >
> > On Tue, Apr 25, 2017 at 9:10 AM Ming Lu <hiluming at gmail.com> wrote:
> >
> >> Dear all:
> >>
> >> I have a question regarding the special function
> >> scipy.special.mathieu_cem, why this function
> >> not periodic? I thought this function should have period pi when m is
> >> even, and 2*pi when m
> >> is odd, however this is not the case:
> >>
> >> x = np.linspace(0,10*np.pi,100)
> >> plt.plot(x,sp.mathieu_cem(3,3,x)[0])
> >> plt.show()
> >>
> >> compare with mathematica, it clearly shows a period graph.
> >>
> >> To see the graph, I have the detailed post on stackoverflow.
> >>
> >>
> >>
> http://stackoverflow.com/questions/43615531/why-mathieu-function-in-scipy-not-periodic
> >>
> >> Best regards,
> >>  Ming
> >> _______________________________________________
> >> SciPy-User mailing list
> >> SciPy-User at python.org
> >> https://mail.python.org/mailman/listinfo/scipy-user
> >>
> >
>
>
> --
> Regards,
>    Ming Lu
>
> ----
> Ming Lu, graduate student of  second year,
> ICQM, Peking University <http://icqm.pku.edu.cn>
> _______________________________________________
> SciPy-User mailing list
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>
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