I got an array similar to the one below, and want to replace all NAs with the previous value. 99 8.2 b NA 8.3 x NA 7.9 x 98 8.1 b NA 7.7 x 99 9.3 b ...
i.e. the first two NAs should be replaced to 99, whereas the last one should be 98. I would like to apply a function to reach row, checking if the value in col 1 is NA, and if it is, set the value to the previous row's col 1 value. Haven't been able to do this without looping, which gets very slow for large datasets... -- View this message in context: http://r.789695.n4.nabble.com/Replacing-values-without-looping-tp3602247p3602247.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.
