[Rd] bug in rank(), order(), is.unsorted() on character vector

From: Hervé Pagès <hpages_at_fhcrc.org>
Date: Wed, 07 Dec 2011 01:41:44 -0800


Hi,

This looks OK:

> x <- c("_1_", "1_9", "2_9")
> rank(x)

[1] 1 2 3

But this does not:

> xa <- paste(x, "a", sep="")
> xa

[1] "_1_a" "1_9a" "2_9a"
> rank(xa)

[1] 2 1 3

Cheers,
H.

ink3"> > sessionInfo()

R version 2.14.0 (2011-10-31)
Platform: x86_64-unknown-linux-gnu (64-bit)

locale:

  [1] LC_CTYPE=en_CA.UTF-8       LC_NUMERIC=C
  [3] LC_TIME=en_CA.UTF-8        LC_COLLATE=en_CA.UTF-8
  [5] LC_MONETARY=en_CA.UTF-8    LC_MESSAGES=en_CA.UTF-8
  [7] LC_PAPER=C                 LC_NAME=C
  [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_CA.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats graphics grDevices utils datasets methods base

loaded via a namespace (and not attached): [1] tools_2.14.0

-- 
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_fhcrc.org
Phone:  (206) 667-5791
Fax:    (206) 667-1319

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Received on Wed 07 Dec 2011 - 09:53:58 GMT

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