[R] identical applied to data frames

Rolf Turner r.turner at auckland.ac.nz
Sun Apr 6 22:56:48 CEST 2014

On 07/04/14 02:00, Rguy wrote:
> I have two data frames that I believe are identical, yet checking them with
> identical() fails.
> Each data frame has two columns named 'pk' and 'newv_f13__bool'. As shown
> below, the columns of the data frames are identical, according to the
> identical() function, yet the data frames themselves are not. How can this
> be?
> Browse[1]> identical(shft$pk, shft_mat$pk)
> [1] TRUE
> Browse[1]> identical(shft$newv_f13__bool, shft_mat$newv_f13__bool)
> [1] TRUE
> Browse[1]> identical(shft, shft_mat)
> [1] FALSE
> I have attached a file in which the two data frames are saved (using the
> save() function).

Attachment did not come through.

What does all.equal() say about your two data frames?


Rolf Turner

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