[R] How to label specific points on a scatterplot

[VictorDelgado]

rstudent,

one solution could be given by spliting your graph in two parts:

part_1 <- # take the desired four points subset #
part_2 <- # all rest points not to label

You will also need one vector with your names. I supose:

list <- c("B13", "G13", "K14", "N14")

So

plot(part_1$x, part_1$y)
text(part_1$x, part_1$y+.1, list)
points(part_2$x, part_2$y)

Maybe you will have to set the limits (xlim and ylim) of your graph and
chage .1 to a more precise value.
Please, take care and ensure carefully reading of command internal help
(typing ?text, for example), the R's help-pages are very clear and didactic. 

Be sure also, searching for previous questions already made in "r-help",
preventing double questions on basic isues, and be more specific possible
about your problem. If your data is from base, I could give you one better
answer.

Take care, Have a god job!

Victor Delgado
cedeplar.ufmg.br P.H.D. student
www.fjp.mg.gov.br reseacher

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