Re: [R] Replace values in a dataframe

Try this:  dat=structure(list(Color = c("5", "<4","5", "<5", "5"), Unit = c("Hazen","Hazen","Hazen", "Hazen", "Hazen")), .Names = c("Color", "Unit"), row.names =c("1:2","1:3", "1:4", "1:5","1:6"), class = "data.frame") dat=as.data.frame(dat)dat$col2 <- rep(" ", nrow(dat))dat[dat$Color == "<4", ][

[R] Proc Mixed variance of random effects in R

Hi, I'm trying to convert the following SAS code in R to get the same result that I get from SAS. Here is the SAS code: DATA plants; INPUT sample $ treatmt $ y ; cards; 1 trt16.426264755 1 trt16.95419631 1 trt16.64385619 1 trt27.34872815