

_O_b_j_e_c_t _A_t_t_r_i_b_u_t_e_s

     attr(x, which)
     attr(x, which) <- value

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

       x: an object whose attributes are to be accessed.

   which: a character string specifying which attribute is
          to be accessed.

_V_a_l_u_e:

     This function provides access to a single object attri-
     bute.  The simple form above returns the value of the
     named attribute.  The assignment form causes the named
     attribute to take the value on the right of the assign-
     ment symbol.

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

     `attributes'

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

     # create a 2 by 5 matrix
     x <- 1:10
     attr(x,"dim") <- c(2,5)

