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Re : Have a function like the "_n_" in R ? (Automatic count function )

Johannes Hüsing 
If you are in the context of a data frame (which is closest to the 
concept
of a "data set" in SAS), the 1:nrow(df) is closest to what you may look
for.

For instance:

data(iris)
.n. <- 1:nrow(iris)

You may notice that this number is not very idiomatic in R.

If you have something like:

if(_N_ > 50) then output;

in R you can simply put

iris[-(1:50),]

without using an explicit counter variable.

In the context of a matrix, the row() and col() functions may do what
you want.



Am 25.02.2009 um 15:34 schrieb justin bem:

Thread (12 messages)

Nash Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 Henrique Dallazuanna Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 David Winsemius Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 Hadley Wickham Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 justin bem Re : Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 Wacek Kusnierczyk Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 Hadley Wickham Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 Gustaf Rydevik Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 Charles C. Berry Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 Wacek Kusnierczyk Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 Gustaf Rydevik Have a function like the "_n_" in R ? (Automatic count function ) Feb 25 Johannes Hüsing Re : Have a function like the "_n_" in R ? (Automatic count function ) Feb 26