On Mon, 6 Jun 2005, Liaw, Andy wrote:
From: Duncan Murdoch
On 6/6/2005 4:43 PM, Omar Lakkis wrote:
How can I get a list of the names of all exported functions
in a library?
I load my library using library() and then want to
dynamically get all
functions that start with "test." to dynamically execute them.
Use search() to see all the _packages_ that have been loaded.
If yours
is second in the list (the typical spot just after calling the
unfortunately named library() function), then ls(2) will list
all of its
exports.
Just to nitpick a bit: That lists all _objects_ in position 2, which may
include objects that are not functions, although it's rare, if at all, that
a package database would contain non-functions...
It's actually common: lazy-loaded datasets are there too, and 'base' has
[1] "F" "LETTERS" "R.version" "R.version.string"
[5] "T" "letters" "month.abb" "month.name"
[9] "pi" "version"
'stats' has "p.adjust.methods" ....
Here's a simple function to find only the functions
lsf <- function(n=2)
{
tmp <- ls(n, all=TRUE)
isf <- sapply(tmp, function(x) is.function(get(x, pos=n)))
tmp[isf]
}
and one could use the 'pattern' arg of ls() to restrict the set.
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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