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From: Klaus Dahlke <kdahlke@gmx.de>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Label problem
Date: Thu, 22 Feb 2024 11:14:03 -0000 (UTC)
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> Tried that, no good. I must bemissing something. Here is a mini-example
> 
> gnuplot << eoi set term postscript enh eps 24 set output 'mini.eps'
> set xlabel "x"
> #set ylabel '{/Symbol i \326 \164}' norotate  --- no good #set ylabel
> '{i /Symbol \326 \164}' norotate  --- no good set ylabel "{/:Italic {i
> \U+221A \U+0305\U+03C4}}"
> plot x*sqrt(x) w p pt 7 quit eoi gv mini.eps
> 
> What am I missing?--
> Dieter Britz

you may have to set explicitly the encoding to utf:
set encoding utf8

Best
Klaus