On Mar 7, 2012, at 4:32 PM, karena wrote:

If a text file has rows of variable lengths. How to read the file into R?

I think some people may suggest using 'fill=T', however, it sort of messes
the data up, for example, in the text file:
a    b    c    d
1    2    3    4
1          8    6
1    2          0
1    1    0

If I read in the file using ', then the
data.frame in R will be:
a    b    c    d
1    2    3    4
1    8    6    NA
1    2    0    NA
1    1    0    NA

You need to specify what your seaprator is. If that is tab-separated, then you need to run:

read.table("data", head=T, sep="\t", fill=T)



Could anyone tell me how to handle this?

Only if you provide reproducible data. At the moment what you pasted into that mailing did not have tabs in it .... at least after your mail client, and then Nabble, and then the Rhelp server had their way with it.

David Winsemius, MD
West Hartford, CT

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