apropos {utils}R Documentation

Find Objects by (Partial) Name

Description

apropos returns a character vector 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 "any", only objects who's mode equals mode are searched.
simple.words logical; if TRUE, the what argument is only searched as whole word.

Details

If mode != "any" only those objects which are of mode mode are considered. If where is TRUE, the positions in the search list are returned as the names attribute.

find is a different user interface for the same task as apropos. However, by default (simple.words == TRUE), only full words are searched with grep(fixed = TRUE).

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

## Not run: apropos("lm")
apropos(ls)
apropos("lq")

cor <- 1:pi
find(cor)        #> ".GlobalEnv"   "package:stats"
find(cor, num=TRUE) # numbers with these names
find(cor, num=TRUE, mode="function")# only the second one
rm(cor)

## Not run: apropos(".", mode="list") # a long list

# need a DOUBLE backslash '\\' (in case you don't see it anymore)
apropos("\\[")

## Not run: # 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,}$")
table(nchar(apropos("^.{8,}$")))
## End(Not run)

[Package utils version 2.1.0 Index]