Re: [Matplotlib-users] use matplotlib to produce mathathematical expression only

On Mon, May 16, 2011 at 10:21 AM, Johannes Radinger <JRa...@gm...>wrote:

>
> -------- Original-Nachricht --------
> > Datum: Mon, 16 May 2011 09:49:24 -0500
> > Von: Benjamin Root <ben...@ou...>
> > An: "mat...@li..." <
> mat...@li...>
> > Betreff: Re: [Matplotlib-users] [SciPy-User] use matplotlib to produce
>      mathathematical expression only
>
> > On Monday, May 16, 2011, Johannes Radinger <JRa...@gm...> wrote:
> > >
> > > -------- Original-Nachricht --------
> > >> Datum: Mon, 16 May 2011 08:28:49 -0500
> > >> Von: Robert Kern <rob...@gm...>
> > >> An: SciPy Users List <sci...@sc...>
> > >> CC: mat...@li...
> > >> Betreff: Re: [Matplotlib-users] [SciPy-User] use matplotlib to produce
> >        mathathematical expression only
> > >
> > >> On Mon, May 16, 2011 at 08:21, Johannes Radinger <JRa...@gm...>
> > wrote:
> > >> > Hello,
> > >> >
> > >> > I want to produce a eps file of following mathematical expression:
> > >> >
> > >>
> >
> r'$F(x)=p*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}+(1-p)*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}$'
> > >> >
> > >> > is it possible to somehow missuse matplotlib for that to produce
> only
> > >> the function without any other plot things? Or is there a better
> python
> > >> library within scipy? I don't want to install the complete latex
> > libraries just
> > >> for producing this single eps file.
> > >>
> > >> Check out mathtex. It is matplotlib's TeX parsing engine and renderer
> > >> broken out into a separate library:
> > >>
> > >> http://code.google.com/p/mathtex/
> > >
> > > I also thought about mathtex but don't know how to use my mathematical
> > expression without a plot of axis etc. any suggestions? I just want to
> have
> > the formated math expression as eps and I don't know how to do it, still
> > after reading in the matplotlib-manual.
> > >
> > > /johannes
> > >
> > >
> > >>
> > >> Also, please send matplotlib questions just to the matplotlib list.
> > >> Thanks.
> > >>
> > >> --
> > >> Robert Kern
> > >>
> > >> "I have come to believe that the whole world is an enigma, a harmless
> > >> enigma that is made terrible by our own mad attempt to interpret it as
> > >> though it had an underlying truth."
> > >>   -- Umberto Eco
> > >>
> > >>
> >
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> > >
> >
> > We have added a new feature to do just that in the development branch,
> > but it should be fairly trivial to do with existing releases of
> > matplotlib.  Just create a figure object and use its figtitle to hold
> > the expression and then save the figure.
>
> It might be trivial but how to remove the axis/plot then and crop the
> extend of the eps?
>
> I tried:
>
> plt.figure()
> plt.title(r'$F(x)=p*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}+(1-p)*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}$',
> fontsize=20)
> plt.show()
>
> /j
>
>
Use figtext instead.  I did the following and it looked fine to me:

plt.figure()
plt.figtext(0.1, 0.5,
r'$F(x)=p*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}+(1-p)*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}$',
fontsize=20)
plt.show()


I hope that helps!
Ben Root