[R] Check if data frame column is numeric

Vitalie Spinu vitosmail at rambler.ru
Wed Dec 17 11:12:18 CET 2008

On Tue, 16 Dec 2008 16:25:07 +0100, Mark Heckmann <mark.heckmann at gmx.de> wrote:

> Hi R-users,
> I want to apply a function to each column of a data frame that is  
> numeric.
colwise(), numcolwise() and catcolwise() in plyr package  turn a function that operates on vectors into one that operates on columns of data frame:

in your case it would be :



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