

apropos {base}                               R Documentation

_F_i_n_d _O_b_j_e_c_t_s _b_y _(_P_a_r_t_i_a_l_) _N_a_m_e

_D_e_s_c_r_i_p_t_i_o_n_:

     `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'.

_U_s_a_g_e_:

     apropos(what, where = FALSE, mode = "any")
     find(what, mode = "any", numeric. = FALSE, simple.words = TRUE)

_A_r_g_u_m_e_n_t_s_:

    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 only word.

_D_e_t_a_i_l_s_:

     `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.

_A_u_t_h_o_r_(_s_)_:

     Kurt Hornik and Martin Maechler (May 1997).

_S_e_e _A_l_s_o_:

     `objects' for listing objects from one place, `search'
     for the search path.

_E_x_a_m_p_l_e_s_:

     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,}$")
     table(nchar(apropos("^.{8,}$")))

