Displaying 1 result from an estimated 1 matches for "start_fekete".
2009 May 01
1
Problems with 'valid columns' when using merge
...' argument of the command, as follows:
> merge_year <- 1986
>
> for (i in 1:10) { # Number of file pairs
+ assign(paste("merged_arunfek_", merge_year, sep=""), merge(x=paste("arunoff_",start_arunoff, sep=""), y=paste("fekete_", start_fekete, sep=""), by=c("Latitude", "Longitude"), sort=FALSE))
+ attach(paste("merged_arunfek_", merge_year))
+ merge_year = merge_year+1
+ }
Error in fix.by(by.x, x) : 'by' must specify valid column(s)
However, as far as I can tell, the column n...