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asciigraph
Go package to make lightweight ASCII line graph ╭┈╯ in command line apps with no other dependencies.
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asciigraph is a library for plotting basic graphs in a terminal. It's probably not what you want to have, still an awesome project.
Or... You might consider writing directly to a frame buffer and rendering the graphics directly, currently Go doesn't have anything like matplotlib, but there are options like 3d game engines: http://g3n.rocks/ https://azul3d.org/
There is this: https://github.com/gonum/plot
So far I've been using gonum anyway the couple times I've needed a chart, so I've used gonum, and while I did get confused in a few cases, I never tried the alternative I've heard mentioned: https://github.com/wcharczuk/go-chart Not sure how it compares, but if I ever have some time, I would love to contribute to gonum especially.