[R] How to access a column by its label?
Marc Schwartz (via MN)
mschwartz at mn.rr.com
Thu Aug 3 21:00:01 CEST 2006
On Thu, 2006-08-03 at 14:44 -0400, Neil McLeod wrote:
> Hi all,
> Is there any way to access a column of a data frame by its label (title)
> rather than its column index? For example, I'd like to be able to select
> animals[,"weight"] rather than animals[,3], if the third column of the
> "animals" data frame has the label "weight".
> Thank you!
You answered your own question...animals[,"weight"]
You can also do:
subset(animals, select = weight)
See ?Extract and ?subset for more information.
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