Thanks for the report.
Indeed, you are correct in that the root of this problem is that
"Bitstream Vera Sans" does not contain these characters, yet it is being
selected erroneously.
It does appear that there is a bug in the font selection algorithm, that
"Bitstream Vera Sans" gets selected as a perfect match even when it is
not the first font in the requested list. Vera Sans ships with
matplotlib and is the "default fallback font", even though it is not
installed as a system font on your computer.
I have a fix here: https://github.com/matplotlib/matplotlib/pull/2771
In the meantime, the solution you arrived at is the probably the best we
can do for now.
Mike
On 01/27/2014 11:21 AM, Phil Elson wrote:
Thanks for this Vlastimil, looks like there is either a subtlety
beyond my font knowledge or a bug here - mdboom, did you have any
ideas? Otherwise I think we need a github issue for this.
Cheers,
On 4 January 2014 19:37, Vlastimil Brom <vlastimil.b...@gmail.com
<mailto:vlastimil.b...@gmail.com>> wrote:
Hi all,
after upgrading to matplotlib 1.3.1, I noticed some display errors on
the plots with regard to accented characters (such as carons etc.).
As I recall, I had similar problem in the past and could work around
them by modifying rcParams, however, this fix doesn't work as expected
in 1.3.1. (with python 2.7.6, 32bit on Win 7, Czech - with both WXAgg
and TKAgg backends).
>From the usual Czech diacritics ác(d(ée(ín(ór(s(t(úu*ýz( some
are not
displayed (d(e(n(r(t(u*) - replacement squares are shown instead.
Simply prepending a suitable font at the beginning of the list
rcParams['font.sans-serif'] doesn't help in 1.3.1.
I eventually found out, that "Bitstream Vera Sans" (which is not
installed on this computer) is somehow offending - as long as this
item is in the list (even at the end), the mentioned characters aren't
displayed.
The problem can be observed in the following simple pylab script:
==============
#! Python
# -*- coding: utf-8 -*-
# with implicit fonts "d(e(n(r(t(u*" are not displayed properly in
the plot title
from matplotlib import rcParams
rcParams['font.family'] = 'sans-serif'
if "Bitstream Vera Sans" in rcParams['font.sans-serif']:
rcParams['font.sans-serif'].remove("Bitstream Vera Sans")
# after appending the "offending" font even at the end of the list (by
uncommenting the following line), d(e(n(r(t(u* are not displayed again
# rcParams['font.sans-serif'].append("Bitstream Vera Sans")
import pylab
pylab.title(u"abcd ác(d(ée(ín(ór(s(t(úu*ýz( äöüß ê xyz")
pylab.show()
==============
Is there something special in the resolution of the font items in
rcParams?
This individual issue seems to be fixed with removing the single font,
but I'd like to understand this more generally, as the installed fonts
on different computers differ.
Thanks in advance
Vlastimil Brom
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