gnuplot> set xlabel "{/Symbol t}"
gnuplot> set term png; set out "test.png"; plot x;set out
Terminal type is now 'png'
Options are 'truecolor nocrop enhanced butt size 640,480 font "arial,12.0" '
gdImageStringFT: fontconfig: Didn't find expected font family. Perhaps URW Type 1 fonts need installing? while printing string t with font Symbol
gdImageStringFT: fontconfig: Didn't find expected font family. Perhaps URW Type 1 fonts need installing? while printing string t with font Symbol
xlabel 为空白
jpeg 和 gif 终端的错误消息类似。PDF 终端工作正常，τ 打印正常。
安装的软件包：gnuplot-qt/noble，现在 6.0.0+dfsg1-1ubuntu3 amd64 fonts-urw-base35/noble，noble，现在 20200910-8 全部
gnuplot 6.0 patchlevel 0 操作系统：Ubuntu 24.04.1 LTS x86_64 内核：6.8.0-47-generic DE：GNOME 46.0