[yt-users] saving files with a different resolution

Wed Mar 31 10:02:25 PDT 2010

Sorry, I was a bit confused: I read after I sent the last e-mail  that you 
tested fig_size = (12,9), and that test with a different aspect ratio did not 
actually work for me. I will test better, or send more details on my script, 
in the next days.
Cheers,

  Luigi

On Wednesday 31 March 2010, Luigi Iapichino wrote:
> Hi Matt,
>
> your fix works, provided the plot is not smaller than 750x600 and the
> aspect ratio is 1.25:1 (thus allowing space for the colorbar). For smaller
> plots the label of the colorbar (whose font size does not scale) will go
> out of the figure. This is not a crucial issue to be fixed: I will simply
> stay above this threshold.
> Thanks for your help,
>
>   Luigi
>
> On Wednesday 31 March 2010, Matthew Turk wrote:
> > Hi Luigi,
> >
> > I think I have tracked it down.  The issue only shows up when the
> > aspect ratio of the axes object -- the image itself -- is not 1.0.
> > What seems to have happened is that there is confusion in the contour
> > callback object (as well as the grid boundary callback, so I would be
> > unsurprised if you saw these same issues there) as to which axis is x
> > and which is y.  I believe this is my fault, dating back quite some
> > time -- fortunately, as you point out, it's very obvious (and should
> > result in broken contours at the edges.)
> >
> > What tipped me off to this was your statement about the figure sizes
> > -- this shouldn't be directly used, but instead only used indirectly
> > via seeing how big (canvas-space) the axes object is inside the
> > contouring code.  Running with a fig_size like (20,16) that ensures
> > aspect ratio of 1.0 in the axes object (allowing 20% for colorbar on
> > the figure itself) worked, so that theory started to pan out.  I have
> > tested with fig_size = (12,9) as well, and this fix works.
> >
> > If you could try changing lines 153 and 154 of yt/raven/Callbacks.py
> > to be "dy =" and "dx =" instead of "dx =" and "dy =" that would be a
> > great help.  If that works for you, I'll commit it to the repository.
> >
> > Thanks very much for this report, and I hope this works out.
> >
> > -Matt
> >
> > On Wed, Mar 31, 2010 at 1:53 AM, Luigi Iapichino
> >
> > <luigi at ita.uni-heidelberg.de> wrote:
> > > Hi Matt,
> > >
> > > both methods work, but I have a further problem: if I try to add
> > > density contours, they appear in the plot, but they are not
> > > superimposed at the correct location. They look like shifted, and I
> > > suppose that
> > >
> > > p.modify["contour"]("Density", ncont=5,take_log=True)
> > >
> > > does not "see" that I changed the size of the figure.
> > > Am I missing something?
> > > Thanks,
> > >
> > >  Luigi
> > >
> > > On Tuesday 30 March 2010, Matthew Turk wrote:
> > >> Hi Luigi,
> > >>
> > >> Yup, you'll just need to provide it with a new "figure".  In
> > >> matplotlib, figures are the background - the entire image, if you will
> > >> - and "axes" are individual plot elements on that.  Here we're going
> > >> to create a figure with 100 dpi that's 12 inches by 9 inches -- this
> > >> should be 1200 by 900 pixels:
> > >>
> > >> fig = raven.matplotlib.figure.Figure(dpi = 100, figsize = (12, 9))
> > >> p = pc.add_projection("Temperature", 0, weight_field="Density")
> > >>
> > >> That's the slightly harder way -- you'll have to generate a new Figure
> > >> object for every plot.  There's a shortcut in yt already, though, that
> > >> accepts a figsize=(width, height) argument, where width and height are
> > >> in inches:
> > >>
> > >> p = pc.add_projection("Temperature", 0, weight_field="Density",
> > >> fig_size=(20, 16))
> > >>
> > >> if you wanted 2000 by 1600 pixels.
> > >>
> > >> Does that help out?
> > >>
> > >> Best,
> > >>
> > >> Matt
> > >>
> > >> On Tue, Mar 30, 2010 at 7:47 AM, Luigi Iapichino
> > >>
> > >> <luigi at ita.uni-heidelberg.de> wrote:
> > >> > Dear all,
> > >> >
> > >> > in one of my scripts I have something like this:
> > >> >
> > >> >    pc = PlotCollection(pf, center=[0.5,0.5,0.5])
> > >> >
> > >> >    p = pc.add_projection("Temperature", 0, weight_field="Density")
> > >> >    p.modify["contour"]("Density", ncont=5, take_log=True)
> > >> >    ...
> > >> >    ...
> > >> >    ...
> > >> >    pc.save("%s_temp-proj" % pf,override=True)
> > >> >
> > >> > The saved file has a resolution of 800x800. Is there a way to change
> > >> > this number in YT? I had a look in the PlotCollection class, but I
> > >> > haven't found what I'm searching.
> > >> >
> > >> > Looking forward to your suggestions,
> > >> > Cheers
> > >> >
> > >> >  Luigi
> > >> >
> > >> > --
> > >> >
> > >> > ---------------------------------------------------------------
> > >> >
> > >> > Luigi Iapichino
> > >> > Zentrum fuer Astronomie der Universitaet Heidelberg
> > >> > Institut fuer Theoretische Astrophysik
> > >> > Albert-Ueberle-Str. 2, D-69120 Heidelberg, Germany
> > >> > Tel: +49 6221 548983, Fax: +49 6221 544221
> > >> > e-mail: luigi at ita.uni-heidelberg.de
> > >> > URL: http://www.ita.uni-heidelberg.de/~luigi/
> > >> > _______________________________________________
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> > >>
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> > >
> > > --
> > >
> > > ---------------------------------------------------------------
> > >
> > > Luigi Iapichino
> > > Zentrum fuer Astronomie der Universitaet Heidelberg
> > > Institut fuer Theoretische Astrophysik
> > > Albert-Ueberle-Str. 2, D-69120 Heidelberg, Germany
> > > Tel: +49 6221 548983, Fax: +49 6221 544221
> > > e-mail: luigi at ita.uni-heidelberg.de
> > > URL: http://www.ita.uni-heidelberg.de/~luigi/
> > > _______________________________________________
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> >
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-- 

---------------------------------------------------------------

Luigi Iapichino
Zentrum fuer Astronomie der Universitaet Heidelberg
Institut fuer Theoretische Astrophysik
Albert-Ueberle-Str. 2, D-69120 Heidelberg, Germany
Tel: +49 6221 548983, Fax: +49 6221 544221
e-mail: luigi at ita.uni-heidelberg.de
URL: http://www.ita.uni-heidelberg.de/~luigi/