In the man page for as.vector() (same as man page for vector()):
Writers of methods for ‘as.vector’ need to take care to follow the
conventions of the default method. In particular
• Argument ‘mode’ can be ‘"any"’, any of the atomic modes,
‘"list"’, ‘"expression"’, ‘"symbol"’, ‘"pairlist"’ or one of
the aliases ‘"double"’ and ‘"name"’.
• The return value should be of the appropriate mode. For
‘mode = "any"’ this means an atomic vector or list.
• Attributes should be treated appropriately: in particular
when the result is an atomic vector there should be no
attributes, not even names.
• ‘is.vector(as.vector(x, m), m)’ should be true for any mode
‘m’, including the default ‘"any"’.
But:
> is.vector(as.vector("a", "name"), "name")
[1] FALSE
Mmmh, the default method itself doesn't seem to follow its own
conventions :-/
Cheers,
H.
> sessionInfo()
R version 3.0.0 (2013-04-03)
Platform: x86_64-unknown-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=C LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.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_3.0.0
--
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: hpa...@fhcrc.org
Phone: (206) 667-5791
Fax: (206) 667-1319
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