function                package:base                R Documentation

_F_u_n_c_t_i_o_n _D_e_f_i_n_i_t_i_o_n

_D_e_s_c_r_i_p_t_i_o_n:

     These functions provide the base mechanisms for defining new
     functions in the R language.

_U_s_a_g_e:

     function( arglist ) expr
     return(value)

_A_r_g_u_m_e_n_t_s:

 arglist: Empty or one or more name or name=expression terms.

   value: An expression, or a series of expressions separated by
          commas.

_D_e_t_a_i_l_s:

     In R (unlike S) the names in an argument list cannot be quoted
     non-standard names.

     If `value' is a series of expressions, the value returned is a
     list of the evaluated expressions, with names set to the
     expressions where these are the names of R objects.

_S_e_e _A_l_s_o:

     `args' and `body' for accessing the arguments and body of a
     function.

     `debug' for debugging; `invisible' for `return(.)'ing invisibly.

_E_x_a_m_p_l_e_s:

     norm <- function(x) sqrt(x%*%x)
     norm(1:4)

     ## An anonymous function:
     (function(x,y){ z <- x^2 + y^2; x+y+z })(0:7, 1)

