Hello,
It's not that complicated.
f <- function(index, dat, offset=5){
x <- data.frame(Emp=dat[, index], Hours=dat[, index + offset])
aggregate(Hours~Emp, data=x, sum)
}
sp <- read.table("supermarkt.txt")
lapply(1:5, f, sp)
Also, please provide context. (Quote the post you are reffering to.)
Hope this helps,
Rui Barradas
Em 25-06-2012 11:43, faelsendoorn escreveu:
I do now know how to navigate through the table.
But my question is, what kind of graphical and numerical summaries can I
make with keeping in mind that I am interested in the average working hour
per employee?
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