

warning {base}                               R Documentation

_W_a_r_n_i_n_g _M_e_s_s_a_g_e_s

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

     `warning' generates a warning message that corresponds
     to its argument and the expression or function from
     which it was called.

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

     warning(message)

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

 message: character string (of length 1) or `NULL'.

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

     The result depends on the value of `options("warn")'.
     If `warn' is negative warnings are ignored; if it is
     zero they are stored and printed after the top-level
     function has completed; if it is one they are printed
     as they occur and if it is 2 (or larger) warnings are
     turned into errors.

     If `warn' is zero (the default), a top-level variable
     `last.warning' is created.  It contains the warnings
     which can be printed via a call to `warnings'.

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

     `stop' for fatal errors, `warnings', and
     `options(warn=..)'.

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

