2012/10/17 Damon McDougall <damon.mcdoug...@gmail.com>
> On Wed, Oct 17, 2012 at 9:12 AM, Francesco Montesano
> <franz.berges...@gmail.com> wrote:
> >
> >
> > 2012/10/17 Eric Firing <efir...@hawaii.edu>
> >>
> >> On 2012/10/16 9:22 PM, Francesco Montesano wrote:
> >> > Dear list,
> >> >
> >> > I've see a difference between the default backend between
> >> >
> >> > v1.1.1 (shipped with kubuntu 12.10dev) and v1.2.0.rc1, 1.2.0rc2 and
> >> > master (1.3.x).
> >> >
> >> >
> >> > My set up is to call ipython with pylab and turn on interactive mode.
> I
> >> > still haven't copied over my matplotlibrc file from my work computer
> >> > (there I use qtagg, if I remember well)
> >> >
> >> >
> >> > On v1.1.1 the default is [backend: TkAgg], while in the other two
> cases
> >> > it is [backend: agg]. Is there some reason for this difference?
> >>
> >> The default should be based on what is found when mpl is built, so it
> >> sounds like when you are building v1.2.x, none of the supported gui
> >> toolkits is being found. I don't know why that is. Are you installing
> >> on a system that has gui toolkits already installed?
> >
> > I think so, as the v1.1.1 shipped with my OS is using TkAgg as backend
> and I
> > can plot interactively.
> >
> > When I build from source I get
> > OPTIONAL BACKEND DEPENDENCIES
> > libpng: found, but unknown version (no pkg-config)
> > Tkinter: no
> > * Using default library and include directories
> for
> > * Tcl and Tk because a Tk window failed to open.
> > * You may need to define DISPLAY for Tk to work
> so
> > * that setup can determine where your libraries
> are
> > * located. Tkinter present, but header files are
> not
> > * found. You may need to install development
> > * packages.
> > * You may need to install 'dev' package(s) to
> > * provide header files.
> > Gtk+: no
> > * Could not find Gtk+ headers in any of
> > * '/usr/local/include', '/usr/include',
> > * '/usr/local/include', '/usr/include', '.'
> > Mac OS X native: no
> > Qt: no
> > Qt4: Qt: 4.8.2, PyQt4: 4.9.3
> > PySide: no
> > Cairo: 1.8.8
> >
> > Could be a problem with Tkinter and dev packages.
> >
> >
> >>
> >>
> >> One useful
> >> technique with ubuntu derivatives is to do
> >>
> >> sudo apt-get build-dep python-matplotlib
> >>
> > probably it's easier if I just switch to qtagg, as I already have it
> >
> >>
> >> It might pull in more than you really want, but it will certainly
> >> include gui toolkits.
> >>
> >> Eric
> >
> > Thanks,
> > Francesco
> >
> >>
> >>
> >> >
> >> >
> >> > cheers,
> >> >
> >> > Francesco
>
> Packages have whatever default backend the maintainer decided to build
> them with. For example, the macports packaged version of matplotlib is
> maintained by someone who specifies the macosx backend to be the
> default. When building from source, I think the TkAgg backend is the
> default, because most platforms have tkinter installed out of the box.
> Since it appears you don't have Tkinter installed, Agg is the default.
>
> Agg is a non-gui backend (but it produces awesome output).
>
Thanks for the explanation.
Fra
>
> --
> Damon McDougall
> http://www.damon-is-a-geek.com
> B2.39
> Mathematics Institute
> University of Warwick
> Coventry
> West Midlands
> CV4 7AL
> United Kingdom
>
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