https://crates.io/crates/gnuplot
http://siegelord.github.io/RustGnuplot/doc/gnuplot/index.html
https://github.com/SiegeLord/RustGnuplot

usages
https://crates.io/crates/trajectory
https://crates.io/crates/cargo-tally
https://docs.rs/cargo-tally
https://github.com/dtolnay/cargo-tally