[R] extract columns from a dataframe
sdavis2 at mail.nih.gov
Mon Jul 5 15:04:06 CEST 2004
If you have a data.frame df like:
Col1 Col2 Col3 Col4
1 2 A B
Then you should be able to do:
to get the second and fourth columns.
On 7/5/04 8:53 AM, "Rado Bonk" <rado.bonk at jrc.it> wrote:
> Dear R users,
> I'm coming back to R after while. I have a data frame with 200 columns,
> each column has a name. How to extract all columns to a new dataset, but
> the specified (by names) ones?
> I was playing with that for a little bit using the vector syntax but got
> several syntax errors.
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
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