Did you mean this:
https://www.orgmode.org/worg/org-contrib/babel/languages/ob-doc-gnuplot.html
which is based on gnuplot?
I haven't heard of #gnuplot before but it seems easy enough (I only want to create a simple graph with x and y).
I'll keep looking into it, need to get my date sorted so it's in a table, at least.
@jrss Actually I was referring to this. But I'm sure there is a way to do what you want with only elisp and gnuplot.
https://www.orgmode.org/worg/org-contrib/babel/languages/ob-doc-python.html#org4973b76