On Jul 2, 2008, at 6:53 AM, Philip James Smith wrote:
Hi R people:
I have huge files with as many as 5000 columns. I'd really like to
read only certain columns of those files. I know column names I
want to read.
I looked at the documentation of read.csv . Although there is a
col.names option, it allows users to specify the names of the
columns, rather than to pick the columns of interest.
Any suggestions on how to pick the columns I want to read only,
rather than the entire file, would be greatly appreciated.
Hello,
I think you want explicitly set the colClasses argument such that the
columns you *don't* want are set to NULL and all others are set to
appropriate classes.
Cheers,
Ben
Phil Smith
Duluth, GA
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