On 8/29/2005 12:11 PM, Ido M. Tamir wrote: > Hi, > > suppose I have a matrix (or dataframe) > as a result from subsetting. > > mat <- matrix(1:20,ncol=2) > mat[c(3,6,9),] <- NA > cc <- complete.cases(mat) > sub <- mat[cc,,drop=FALSE] > sub <- sub * 2 > #some caluculations with sub. > > now I would like to expand sub somehow > so row 3,6, and 9 would be filled with > NAs but the rest should be in place again. > Is there a simple function for this? > > merge is not an option. > > Thank you very much for your help.
You just need to calculate the original row numbers. For example, goodrows <- (1:nrow(mat))[cc] mat[goodrows,,drop=FALSE] <- sub Duncan Murdoch ______________________________________________ [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
