Install libalien-gnuplot-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libalien-gnuplot-perl
Description:
module to find and validate the gnuplot executable
Alien::Gnuplot verifies existence and sanity of the gnuplot external application. It only declares one access method, Alien::Gnuplot::load_gnuplot, which does the actual work and is called automatically at load time. Alien::Gnuplot doesn't have any actual plotting methods - making use of gnuplot, once it is found and verified, is up to you or your client module.
Homepage: https://metacpan.org/release/Alien-Gnuplot
Version: 1.033-1
Section: universe/perl