The currently implemented bounding box algorithm is very simple and it
basically only accounts the title, axis label and ticklabels etc. I
thought about implementing a general algorithm that accounts all the
visible artist, but I found it very difficult (at least for me) given
the support of the spline path and clipping. So, at the moment this is
beyond me and I have no plan to improve it. But any contribution will
be welcomed.
As a workaround, savefig can take bbox_extra_artists keyword (this may
only be in the svn version though), which is a list artist that needs
to be accounted for the bounding box calculation. So in your case, the
below code will work.
t1 = ax.text(-0.2,0.5,'text',transform=ax.transAxes)
fig.savefig('test.png', bbox_inches='tight', bbox_extra_artists=[t1])
Given that this will not be fixed in near future and a workaround
being suggested, I'm moving this to a feature request.
-JJ
On Thu, Jun 3, 2010 at 10:05 AM, Thomas Robitaille
<thomas.robitai...@gmail.com> wrote:
> Hello,
>
> I have run into a problem with the bbox_inches='tight' option which allows a
> tight bounding box to be computed for a plot. In the following example:
>
> import matplotlib
> matplotlib.use('Agg')
> import matplotlib.pyplot as mpl
>
> fig = mpl.figure()
> ax = fig.add_subplot(1,1,1)
> ax.text(-0.2,0.5,'text',transform=ax.transAxes)
> fig.savefig('test.png', bbox_inches='tight')
>
> matplotlib produces a plot where the text label does not appear. This may be
> due to the bounding box algorithm not taking into account text written using
> Axes.text that could fall outside the Axes. One solution is to use set_xlabel
> and set_ylabel, for which the bounding box is correctly calculated, but in
> some cases it is desirable to plot labels outside the box using 'text' (for
> example if multiple labels are needed).
>
> I have submitted a bug report here:
>
> https://sourceforge.net/tracker/?func=detail&aid=3011032&group_id=80706&atid=560720
>
> Cheers,
>
> Tom
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