--- downunder <larsfromspace at web.de> wrote: > > Hi all, > > I have to recode some values in a dataset. for > example changing all zeros to > "." or 999 would be also ok. does anybody know how > to do this? thanks in > advance. lars Hi Lars. Marc has warned you about . 999 vs NA A couple of approachs: aa <- c(2,3,5,7,7, 3) aa[aa==7] <- 5 aa or library(car) ?recode