= gnuplot
{c}
{wiki=Gnuplot}
Tends to be <Ciro Santilli>'s first attempt for quick and dirty graphing: https://github.com/cirosantilli/gnuplot-cheat[].
<domain-specific language>. When it get the jobs done, it is in 3 lines and it feels great.
When it doesn't, you Google for an hours, and then you give up in frustration, and fall back to <Matplotlib>.
Couldn't handle exploration of large datasets though: <Survey of open source interactive plotting software with a 10 million point scatter plot benchmark by Ciro Santilli>