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Message-ID: <ih142e$ufq$1@dough.gmane.org>
Date: 2011-01-17T10:01:46Z
From: Johannes Graumann
Subject: Finding NAs in DF

Hi,

What is an efficient way to take this DF

	data.frame(A=c(1,2,NA,NA),B=c(1,NA,NA,4))

and get 
	c(NA,"TWO","BOTH","ONE")

as the result, where NA corresponds to a row without "NA"s, TWO indicates NA 
in the second and ONE in the first column.

Thanks for any pointers.

Joh