HI all,
if first name is Alex then I want concatenate the second column to Alex
to produce Alex and the second column value
DF1 <- read.table(header=TRUE, text='first YR
Alex 2001
Bob 2001
Cory 2001
Cory 2002
Bob 2002
Bob 2003
Alex 2002
Alex 2003
Alex 2004')
Output
data frame
DF2
Alex-2001 2001
Bob 2001
Cory 2001
Cory 2002
Bob 2002
Bob 2003
Alex-2002 2002
Alex-2003 2003
Alex-2004 2004
I tried this one but did not work.
DF1$first[DF1$first=="Alex"] <- paste(DF1$first, DF1$YR, sep='-')
Thank you in advance
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