| apropos {utils} | R Documentation |
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.
apropos(what, where = FALSE, ignore.case = TRUE, mode = "any") find(what, mode = "any", numeric = FALSE, simple.words = TRUE)
what |
character string with name of an object, or more generally a regular expression to match against. |
where, numeric |
a logical indicating whether positions in the search list should also be returned |
ignore.case |
logical indicating if the search should be
case-insensitive, |
mode |
character; if not |
simple.words |
logical; if |
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).
For apropos character vector, sorted by name, possibly with
names giving the (numerical) positions on the search path.
For find, either a character vector of environment names, or for
numeric = TRUE, a numerical vector of positions on the search path,
with names giving the names of the corresponding environments.
Kurt Hornik and Martin Maechler (May 1997).
glob2rx to convert wildcard patterns to regular expressions.
objects for listing objects from one place,
help.search for searching the help system,
search for the search path.
require(stats)
## Not run: apropos("lm")
apropos("GLM") # more than a dozen
## that may include internal objects starting '.__C__' if
## methods is attached
apropos("GLM", ignore.case = FALSE) # not one
apropos("lq")
cor <- 1:pi
find("cor") #> ".GlobalEnv" "package:stats"
find("cor", numeric=TRUE) # numbers with these names
find("cor", numeric=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)