sum                   package:base                   R Documentation

_S_u_m _o_f _V_e_c_t_o_r _E_l_e_m_e_n_t_s

_D_e_s_c_r_i_p_t_i_o_n:

     `sum' returns the sum of all the values present in its arguments.
     If `na.rm' is `FALSE' an `NA' value in any of the arguments will
     cause a value of `NA' to be returned, otherwise `NA' values are
     ignored.

_U_s_a_g_e:

     sum(..., na.rm=FALSE)

