asOneSidedFormula           package:stats           R Documentation

_C_o_n_v_e_r_t _t_o _O_n_e-_S_i_d_e_d _F_o_r_m_u_l_a

_D_e_s_c_r_i_p_t_i_o_n:

     Names, expressions, numeric values, and character strings are
     converted to one-sided formulas. If 'object' is a formula, it must
     be one-sided, in which case it is returned unaltered.

_U_s_a_g_e:

     asOneSidedFormula(object)

_A_r_g_u_m_e_n_t_s:

  object: a one-sided formula, an expression, a numeric value, or a
          character string.

_V_a_l_u_e:

     a one-sided formula representing 'object'

_A_u_t_h_o_r(_s):

     Jose Pinheiro and Douglas Bates

_S_e_e _A_l_s_o:

     'formula'

_E_x_a_m_p_l_e_s:

     asOneSidedFormula("age")
     asOneSidedFormula(~ age)

