What about a gnuplot> REPL mode?

[favba]

First of all, thank you for this very useful package!
So, I had this idea, but I really don't know how hard it would be to implement or if it is desirable.
But what about a gnuplot> REPL mode (mainly to pass setting commands to gnuplot)? Similar to shell mode or Pkg3.jl's pkg REPL mode.
I believe this would be really helpful for those already familiar with gnuplot.
Ideally one would be able to do:

julia> using Gaston

julia> a = rand(10);

julia> : # upon typing : (or whichever character is decided), the prompt changes (in place) to: gnuplot>

gnuplot> set logscale x

gnuplot> set  key bottom left

gnuplot> set xtics 1,1,12 nomirror

# press backspace to exit gnuplot REPL mode

julia> plot(a)

[mbaz]

That's an intriguing idea for sure!

I would like to implement this, but I don't know how to implement the custom REPL mode (sending the commands to gnuplot is easy). If a PR implementing this is made, I'll accept it. Otherwise, I'll put it on my todo list and get it done -- someday :)

[mbaz]

BTW, and just in case you're not aware of it, you can do something similar right now with the gpcom ("gnuplot command") option to plot, which allows you to specify commands to run before plotting:

using Gaston
a = rand(10);
plot(a, gpcom="set logscale x; set  key bottom left; set xtics 1,1,12 nomirror")

[favba]

I was not aware of that! That is extremely useful!