inadverted reordering of a df column when it is copied to another df
Hello, Not an answer to the OP's statement, but > class(1L:40000L) [1] "integer" > class(1:40000) [1] "integer" When using m:n there's no need for mL or nL. Rui Barradas Em 17-03-2017 16:58, Jeff Newmiller escreveu:
Reprex confirming Bert: A <- data.frame( y = 1L:40000L ) B <- data.frame( x = 1L:40000L ) A$x <- B$x plot(B$x) #'  Care to demonstrate for us, Karl? https://cran.r-project.org/web/packages/reprex/README.html On Fri, 17 Mar 2017, Bert Gunter wrote:
You are wrong. No reordering occurs. Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Fri, Mar 17, 2017 at 8:05 AM, Karl Schilling <karl.schilling at uni-bonn.de> wrote:
Dear all: I have two data.frames A and B of the same number of rows (about 40,000). I realized that when I copy column x from data.frame A to B, the order of this column gets changed. This seems to affect only values in rownumbers > ~ 35/36,000. It also happens in any of the following three approaches: A$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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