[R] row indexes from logical statment

[stephen sefick]

Is there any easy way to pull out the row indexes for a logical
matching statment?

#################example code#########################################
foo <- data.frame(name=c(rep("A", 25), rep("B", 25), rep("C", 25),
rep("A", 25)), stuff=rnorm(100), and=rnorm(100), things=rnorm(100))

#this is what I want but I would like the row indexes
foo[foo[,1]==A,]
######################################################################

Also, is there a way to get both A or B into the logical statment

thanks so much for all of your help

Stephen

-- 
Stephen Sefick

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.  We are mammals, and have not exhausted the
annoying little problems of being mammals.

								-K. Mullis