[R] labelling dots in plots

[Anne Katrin Heinrichs]

Hello,

I would like to label outliers (or all dots) in a plot

plot(as.matrix(ValAddInd_byYear), as.matrix(Cons_Elec_Ind_byYear))

ideally by the 30 different row.names, but anything else (x or y values, for example)
would already be helpful.
I've tried various things with pch, but they didn't work and I can't find anything else.

Any hint appreciated!
Thanks,

Katrin