Since the first google and Rseek.org results did not help me with my problem of splitting a string in R, I want to clip it here, so I do not have to click through all of these pages again :)
The command is as easy as this:
> y <- "100,200,300"
> x <- strsplit(y, ',')
> x
[[1]]
[1] "100" "200" "300"