my data(*.txt) has 1000 observations(numbers with no characters) of 5 variables. quite simple.
However, NA values are quite tricky. this observer used more than two names for NA values; "." and "na" and more. 1. If I don't want to manipulate this raw data at all, how can I read this table? (meaning, can I set more than two names for na.strings=" " in read.table()?) 2. What happens if I don't set any NA value names in read.table()? Does R read "."(dot) and "na" as NA value? 3. If Q1 is not possible, what is the best way to get the values I want? (let's say I want means of all variables. I give conditions on my mean()?) -- View this message in context: http://r.789695.n4.nabble.com/more-than-two-NA-value-names-in-my-data-tp2730161p2730161.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
