Hi Tom, I followed you suggestion and found the following:
class(temp.dat$WTD) #[1] "numeric" temp.dat$WTD<-na.approx(temp.dat$WTD,as.numeric(as.Date(temp.dat$Meas_Date,"%m/%d/%Y"))) class(temp.dat$WTD) #[1] "numeric" Have I misunderstood you? If not, then my original confusion still stands... Respectfully, Eric -- View this message in context: http://r.789695.n4.nabble.com/optim-and-singularity-tp3168722p3168955.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.
