search for: tp2278863p2279385

...in, na.rm=T) ## Can loop this over all columns; new<-matrix(0,5,2) for (i in 3:7) {datum[,i][is.na(datum[,i])==T]<-5 new[i-2,]<-tapply(datum[,i], datum$site, min, na.rm=T)} -- View this message in context: http://r.789695.n4.nabble.com/information-reduction-database-management-question-tp2278863p2279385.html Sent from the R help mailing list archive at Nabble.com.