[Rd] named empty list
Hervé Pagès
hpages at fhcrc.org
Thu Jun 3 22:25:10 CEST 2010
Hi,
I just realized that a named empty list is displayed the same
way as an empty list:
> list(aa=2:5)[0]
list()
> list()
list()
For empty atomic vectors, the print method makes the difference:
> c(aa=3L)[0]
named integer(0)
> integer(0)
integer(0)
Maybe lists could do that too?
Thanks,
H.
> sessionInfo()
R version 2.12.0 Under development (unstable) (2010-04-20 r51787)
x86_64-unknown-linux-gnu
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=C LC_MESSAGES=en_CA.UTF-8
[7] LC_PAPER=en_CA.UTF-8 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
--
Hervé Pagès
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M2-B876
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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