Show HN: ZeGrapher v4: modern math plotter

ZeGrapher is a free an open-source math plotter, first release in 2011 (I thought there were no such app on Linux at the time), that I kept sporadically updating ever since. Last version was 6 years ago but a lot of work went into it.

v4 is a near complete rewrite to a modern interface and approach, inspired by desmos.

Interesting differenciating features:

- Computing and plotting recursive sequences - svg and pdf export at the physical size you see or set on your screen, in centimeters - "schrodinger" constants: define constants that take many values at once, any expression that depends on it is plotted for each value, with a user set color gradient. - an interesting graphical way to deal with CSVs and can handle large ones (millions of lines)

The rest on the website !

I want it to be able to make graphs that can be used in research articles, not quite there yet. I want math formatted (like katex) titles and legends at least.

Already found stuff to fix on this rc, feedback welcome!