I tried this...
$ cat test-case.gnuplot
set terminal svg
plot sin(x) title 'utf-8 test ĉĝĥĵŝŭ (Esperanto diacritics)'
$ gnuplot test-case.gnuplot > test.svg
$ head -1 foo.svg
<?xml version="1.0" encoding="utf-8" standalone="no"?>
... and looking at test.svg with inkscape for example, I can see proper
accentuated characters (good)
However, I can't see the sin(x) function!? (which is a bug in the svg
terminal of gnuplot it seems)
I also tried with the "png" terminal instead of "svg" and then utf-8 does not
work. I see garbage.
I need to to set latin1 title to see them properly.
In gnuplot, when doing "help encoding", I see:
gnuplot> help encoding
The `set encoding` command selects a character encoding.
Syntax:
set encoding {<value>}
show encoding
Valid values are
default - tells a terminal to use its default encoding
iso_8859_1 - the most common Western European font used by many
Unix workstations and by MS-Windows. This encoding is
known in the PostScript world as 'ISO-Latin1'.
iso_8859_2 - used in Central and Eastern Europe
iso_8859_15 - a variant of iso_8859_1 that includes the Euro symbol
koi8r - popular Unix cyrillic encoding
koi8u - ukrainian Unix cyrillic encoding
cp437 - codepage for MS-DOS
cp850 - codepage for OS/2, Western Europe
cp852 - codepage for OS/2, Central and Eastern Europe
cp1250 - codepage for MS Windows, Central and Eastern Europe
Generally you must set the encoding before setting the terminal type.
Note that encoding is not supported by all terminal drivers and that
the device must be able to produce the desired non-standard characters.
Press return for more:
The PostScript, X11 and wxt terminals support all encodings. OS/2 Presentation
Manager switches automatically to codepage 912 for `iso_8859_2`.
Hmmm, it seems that gnuplot is not yet aware of Unicode, or at least it's not
described in "help encoding".
Trying "set encoding utf-8" gives an error:
gnuplot> set encoding utf-8
^
expecting one of 'default', 'iso_8859_1', 'iso_8859_2', 'iso_8859_15',
'cp437', 'cp850', 'cp852', 'koi8r' or 'koi8u'
Shouldn't gnuplot look at the current locale anyway to decide what
default encoding to use?
--
Gnuplot svg output is broken
https://bugs.launchpad.net/bugs/314023
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