Hi folks, I have a simple question that I just can't solve.

I'm trying to merge two columns in my data frame.

> sessionInfo()
R version 2.13.0 (2011-04-13)
Platform: i686-pc-linux-gnu (32-bit)

> head(dat)
Year   Month Number
2002   Jan       0
2002   Feb       0
2002   March    0
2002   April      1
2002   May      0
2002   June     0

I tried to do the following, but it doesn't work.

dat$Time <- merge(dat[,1], dat[,2])
head(dat)


Help, Abraham.

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