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: hpa...@fredhutch.org
Phone:  (206) 667-5791
Fax:    (206) 667-1319

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