| apropos {base} | R Documentation |
Find Objects by (Partial) Name
Description
apropos returns a vector of character strings giving the names of
all objects in the search list matching what.
find is a different user interface to the same task as apropos.
Usage
apropos(what, where = FALSE, mode = "any")
find(what, mode = "any", numeric. = FALSE, simple.words = TRUE)
Arguments
what |
name of an object, or regular expression to match against |
where, numeric. |
a logical indicating whether positions in the search list should also be returned |
mode |
character; if not |
simple.words |
logical; if |
Details
apropos returns a vector of character strings giving the names of
all objects in the search list matching what.
If mode != "any" only those objects which are of mode mode
are considered.
If where is TRUE, their position in the search list is
returned as their names attribute.
find is a different user interface to the same task as apropos.
However, by default (simple.words == TRUE), only full words are
searched.
Author(s)
Kurt Hornik and Martin Maechler (May 1997).
See Also
objects for listing objects from one place,
help.search for searching the help system,
search for the search path.
Examples
apropos("lm")
apropos(ls)
apropos("lq")
lm <- 1:pi
find(lm) ##> ".GlobalEnv" "package:base"
find(lm, num=T) ## .. numbers with these names
find(lm, num=T, mode="function")# only the second one
rm(lm)
apropos(".", mode="list")
# need a DOUBLE backslash `\\' (in case you don't see it anymore)
apropos("\\[")
# everything
length(apropos("."))
# those starting with `pr'
apropos("^pr")
# the 1-letter things
apropos("^.$")
# the 1-2-letter things
apropos("^..?$")
# the 2-to-4 letter things
apropos("^.{2,4}$")
# the 8-and-more letter things
apropos("^.{8,}$")
table(nchar(apropos("^.{8,}$")))