how are the function directories organised?

[oxy]

Hi all

i was happy with the following octave path:

addpath(genpath('/usr/local/share/octave/packages'))

Untill i needed the function oneplot, which is here:

addpath(/usr/share/plplot_octaves)

However this command warns a lot about  "shadows a core library function"...
and indeed some basic functions dont work any longer.

Questions:
1) why are the octave functions split in different dirs?
2) is /usr/local/share/octave/packages just an old undeleted storage dir?
3) But oneplot is only there !?

I've been always added missing functions with patch solutions.
Now I'd like to understand a little more about its organisations.

For the moment still using 3.6.4 on linux. Ugrgading soon ...

BTW: is oneplot completely equivalent to subplot(1,1,1)?

Thx for your helpfull words!
oxy