Here is How to install Gnuplot in Ubuntu 18.04. Just copy and paste the commands below into your Ubuntu terminal to get this package.
What is Gnuplot?
Gnuplot is a Command-line driven interactive plotting program. It is a portable command-line driven interactive data and function plotting utility. It supports lots of output formats, including drivers for many printers, (La)TeX, (x)fig, Postscript, and so on.
How to install Gnuplot in Ubuntu?
Update your system first then install Gnuplot package in your Ubuntu os. Open your Ubuntu terminal and just copy and paste these commands:
sudo apt update sudo apt install gnuplot-x11