[R] Counting NA?

Matej Cepl matej at ceplovi.cz
Wed Oct 23 08:48:20 CEST 2002


how to do quickly equivalent of the following?

	counter = 0
	for(i in 1:length(data$S2)) {
		if(!is.na(data$S2[i])) {
			counter = counter + 1

I have imagined something like length(x,na.rm=TRUE).

How can I get values usually taken from tables like z-score, 
values of t distribution etc.? I could not find them among 
values mentioned in info file.



Matej Cepl, matej at ceplovi.cz, PGP ID# D96484AC
138 Highland Ave. #10, Somerville, Ma 02143, (617) 623-1488
The difference between death and taxes is death doesn't get worse
every time Congress meets
    -- Will Rogers

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