pst-tools: helper functions -- psPrintValue on PostScript level -- \psGetElement of a comma separated list Save the files pst-tools.sty|pro|tex in a directory, which is part of your local TeX tree. The pro file should go into $TEXMF/dvips/pstricks/ Then do not forget to run texhash to update this tree. For more information see the documentation of your LATEX distribution on installing packages into your local TeX system pst-tools needs pst-plot (pstricks-add) and pstricks, which should be part of your local TeX installation, otherwise get it from a CTAN server, https://mirror.ctan.org PSTricks is PostScript Tricks, the documentation cannot be run with pdftex, use the sequence latex->dvips->ps2pdf. %% This program can be redistributed and/or modified under the terms %% of the LaTeX Project Public License Distributed from CTAN archives %% in directory macros/latex/base/lppl.txt. %% $Id: README 246 2021-09-13 20:06:21Z herbert $ hvoss@tug.org