Gnuplot "enhanced" PNG doesn't produce Greek letters (libgd/fontconfig)

English Applications
1

Hi, I’m trying to create a plot with Greek letters in the labels. It isn’t working in 12.2, but it was in 12.1. Here’s the steps to reproduce:

  1. Open gnuplot
  2. Execute
set terminal png enhanced
set output 'test.png'
set xlabel '{/Symbol c}'
plot sin(x)
unset output
exit

For me, this produces two lines of error output:

gdImageStringFT: fontconfig: Didn't find expected font family. Perhaps URW Type 1 fonts need installing? while printing string c with font Symbol
gdImageStringFT: fontconfig: Didn't find expected font family. Perhaps URW Type 1 fonts need installing? while printing string c with font Symbol

and the figure does not have the Greek letter printed. I’ve tried installing various font packages and tried playing around with the fontconfig and libgd configurations, but I’ve had no success. Has anyone else encountered this? Could you please try this and see if you get the same output so I might have a better idea of what to put in a bug report?

2

No idea how to solve the error when using the /Symbol c notation (never
used that), but is using terminal epslatex an option for you such that
you get full latex support?

–
PC: oS 12.2 x86_64 | i7-2600@3.40GHz | 16GB | KDE 4.8.5 | GeForce GT 420
ThinkPad E320: oS 12.2 x86_64 | i3@2.30GHz | 8GB | KDE 4.9.2 | HD 3000
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3

I’m on Suse 11.4. I ran you code and got a greek chi. I did “help fonts” in gnuplot, and it said that it had no font facilities, instead using the font provided by the terminal. Maybe you should make sure your terminal is using a unicode (UTF-8) font? Or maybe try a different terminal?