[Rd] Unexpected dimnames attribute returned by cbind/rbind
Hervé Pagès
hpages at fredhutch.org
Fri Dec 22 09:57:10 CET 2017
Hi,
> m5 <- cbind(integer(5), integer(5))
> m5
[,1] [,2]
[1,] 0 0
[2,] 0 0
[3,] 0 0
[4,] 0 0
[5,] 0 0
> dimnames(m5)
NULL
No dimnames, as expected.
> m0 <- cbind(integer(0), integer(0))
> m0
[,1] [,2]
> dimnames(m0)
[[1]]
NULL
[[2]]
NULL
Unexpected dimnames attribute!
rbind'ing empty vectors also returns a matrix with unexpected
dimnames:
> dimnames(rbind(character(0), character(0)))
[[1]]
NULL
[[2]]
NULL
Cheers,
H.
--
Hervé Pagès
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M1-B514
P.O. Box 19024
Seattle, WA 98109-1024
E-mail: hpages at fredhutch.org
Phone: (206) 667-5791
Fax: (206) 667-1319
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