[R] inadverted reordering of a df column when it is copied to another df

Bert Gunter bgunter.4567 at gmail.com
Fri Mar 17 16:33:50 CET 2017

You are wrong. No reordering occurs.


Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )

On Fri, Mar 17, 2017 at 8:05 AM, Karl Schilling
<karl.schilling at uni-bonn.de> wrote:
> Dear all:
> I have two data.frames A and B of the same number of rows (about 40,000). I
> realized that when I copy column x from data.frame A to B, the order of this
> column  gets changed. This seems to affect only values in rownumbers > ~
> 35/36,000. It also happens in any of the following three approaches:
> A$x <- B$x
> x <- B$x (here, x is still in the correct order)
> B$x <- x : now x is reordered
> B <- cbind(A, B$x)
> I am working with Windows7Pro/64bit, R 3.3.3, and RStudio 0.99.903.
> Any help would be appreciated.
> Best regards
> Karl Schilling
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