apropos(pattern, where = FALSE, mode = "any") find(what, mode = "any", numeric. = FALSE, simple.words = TRUE)
what,pattern
| 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 only word.
|
apropos returns a vector of character strings giving the names of
all objects in the search list matching pattern.
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.
objects for listing objects from one place,
search for the search path.
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,}$")))