Hi, Try: rl <- rle(is.na(a)) max(rl$lengths[rl$values]) #[1] 3
A.K. Hi, I'd like to detect whether a vector contains a sequence of NA values of a certain length. So, for example, if I have a vector a = c(1,NA,NA,4,NA,NA,NA,5); how can I find what the longest sequence of NAs is (in this case 3)? Note that this is different from simply summing the number of NA values in the vector (which would be 5 in this case)... Thanks for your help ! ______________________________________________ [email protected] 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.
