In the current case, where the user simply wants to insert a single Greek letter, the quickest path to success will be to use a terminal that supports Unicode. It’s better to adopt a workflow that will produce more attractive output, will be more likely to actually produce the characters you want, and be less likely to suddenly fail when you change your system’s font configuration. Using the “enhanced” business does not lead to good output in general, but can be acceptable for inserting a single character. There are two types of solutions to this problem. The user is trying to insert the letter using the “enhanced” font handling ( set term png enhanced) codes the problem is in the system font configuration, rather than with gnuplot per se. It stopped working after an operating system upgrade. The problem arises in attempting to use a Greek letter in a label using the PNG terminal. Therefore this page becomes another entry in my campaign to replace buggy web fora with the open web. So I’ll answer here, and hope that “quantamm” knows how to use Google and feed readers. I actually tried to register there in order to answer the question, but the site, run by the Novell corporation, is seriously broken and I get nothing but redirect loops and database errors. User “quantamm” asks for help with gnuplot on the openSUSE forum.
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