Plot an arrow in 2.9.12+?

[Peter Gustafson]

Hi,

What is the best way to plot an arrow in 2.9.12?  Is there a way to
directly access the arrow tool (set arrow...) in gnuplot?  I've not had
success... has anybody else tried or is this a feature that still needs
to be implemented.

As a secondary question... What role does __gnuplot_raw__ or
__gnuplot_set__ play in the current plot implementation?  They don't
seem to do much if anything.  Have they basically gone away? 

Thanks in advance,

Pete