basically this works:
plot(, , "*")
but I think it would be more convenient to add some kind of auto casting to the function in order to make this
plot(1, 1, "*")
I use those single-point-plotting-commands a lot in order to highlight a special point in a series of data, but I forget the  all the time.
Besides being much more convenient (at least for me) this behavior would also be much closer to the matlab version, since this works there without any problems.
Any ideas/comments/criticism on this?