On Mon, May 16, 2011 at 11:22 AM, Johannes Radinger <jradin...@gmx.at>wrote:
>
> -------- Original-Nachricht --------
> > Datum: Mon, 16 May 2011 10:59:34 -0500
> > Von: Benjamin Root <ben.r...@ou.edu>
> > An: Johannes Radinger <jradin...@gmx.at>
> > CC: matplotlib-users@lists.sourceforge.net
> > Betreff: Re: [Matplotlib-users] use matplotlib to produce mathathematical
> expression only
>
> > On Mon, May 16, 2011 at 10:21 AM, Johannes Radinger
> > <jradin...@gmx.at>wrote:
> >
> > >
> > > -------- Original-Nachricht --------
> > > > Datum: Mon, 16 May 2011 09:49:24 -0500
> > > > Von: Benjamin Root <ben.r...@ou.edu>
> > > > An: "matplotlib-users@lists.sourceforge.net" <
> > > matplotlib-users@lists.sourceforge.net>
> > > > Betreff: Re: [Matplotlib-users] [SciPy-User] use matplotlib to
> produce
> > > mathathematical expression only
> > >
> > > > On Monday, May 16, 2011, Johannes Radinger <jradin...@gmx.at> wrote:
> > > > >
> > > > > -------- Original-Nachricht --------
> > > > >> Datum: Mon, 16 May 2011 08:28:49 -0500
> > > > >> Von: Robert Kern <robert.k...@gmail.com>
> > > > >> An: SciPy Users List <scipy-u...@scipy.org>
> > > > >> CC: matplotlib-users@lists.sourceforge.net
> > > > >> Betreff: Re: [Matplotlib-users] [SciPy-User] use matplotlib to
> > produce
> > > > mathathematical expression only
> > > > >
> > > > >> On Mon, May 16, 2011 at 08:21, Johannes Radinger <
> jradin...@gmx.at>
> > > > 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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> > > > > _______________________________________________
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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()
> >
>
>
> thats working nearly perfect, I would just need to crop the display extend
> resp. the white space from the eps around...any option/idea?
>
>
> /j
>
>
Try setting bbox_inches='tight' in the call to savefig. With
bbox_inches='tight', you can then specify the 'pad_inches' kwarg to indicate
how much padding to put around the tight bounding box. This should work,
however some older version of matplotlib might not check the figure text
objects for calculating the tightest bounding box. In that case, the way
that I typically autocrop my eps files is to convert it into a pdf file and
use pdfcrop and then convert it back to eps (assuming you have a standard
linux install). Here is the chain of commands I typically use on my Fedora
machine:
epstopdf mathtext.eps --outfile=mathtext.temp.pdf
pdfcrop --margins '15 2 15 2' --clip mathtext.temp.pdf mathtext.cropped.pdf
pdftops mathtext.cropped.pdf mathtext.cropped.eps
You can adjust margins to your tastes, and the names of the files are fairly
arbitrary.
I hope that helps!
Ben Root
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What every C/C++ and Fortran developer should know.
Learn how Intel has extended the reach of its next-generation tools
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http://p.sf.net/sfu/intel-dev2devmay
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