Request for docs on interaction model

[clements@…]

It's unclear from the docs how what the model is for an interaction between DrScheme?
and gnuplot. It appears that there's some kind of stateful sequence where you add
pieces of data and then call plot, but I'm not sure whether it gets reset when you plot,
etc. The docs on gnuplot-plot are also less helpful than they could be; it appears from
the way the docs are structured that calling 'gnuplot-plot' is supposed to open a window;
it doesn't, on my machine, but I can't tell whether this is a doc bug or a gnuplot.plt bug
(or whether I just need to update DrScheme?, which I'm trying now).