Install libgrafx11-1-gfortran by entering the following commands in the terminal:
sudo apt update sudo apt install libgrafx11-1-gfortran
Description:
CERNLIB data analysis suite - interface to X11 and PostScript
CERNLIB is a suite of data analysis tools and libraries created for use in physics experiments, but also with applications to other fields such as the biological sciences. . This package includes libgrafX11, also known as HIGZ (High-level Interface to Graphics and ZEBRA), an interface to the X Window System. In addition to basic drawing functions, HIGZ includes a PostScript interface. . Note that in order to compile and link programs against this library, you must also install the libgrafx11-1-dev package.
Homepage: http://cernlib.web.cern.ch/cernlib/
Version: 20061220+dfsg3-4.3ubuntu1
Section: universe/libs