tring at mail1.stofanet.dk
Tue Dec 15 10:15:28 CET 1998
Dear friends. This is again a very simple question, and I hope you will accept it. I have a dataset with variables in columns all with their names. Now I want to add a column indicating simply identity of patients, numbered according to row. There are 34 rows.
So I did:
>ID <- c(1:34)
but was not allowed to
>Ptt <- cbind(patients,ID)
and was informed that
>Error: names attribute must be the same length as the vector
So, I removed the names
>newname <- names(patients)
>names(patients) <- NULL
>ptt <- cbind(patients,ID)
but still got
Error: names attribute must be the same length as the vector
in spite of
One thing, is that inconsistent ?
Short of editing my data file, which would not be very difficult in this case, how could I do it ?
Troels Ring, MD
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