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- _T_h_e _N_u_m_b_e_r _o_f _L_e_v_e_l_s _o_f _a _F_a_c_t_o_r
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- nlevels(x)
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- _D_e_s_c_r_i_p_t_i_o_n:
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- nlevels returns the number of levels which its argument
- has. If the argument is not a factor NA is returned.
-
- The actual factor levels (if they exist) can be
- obtained with the levels function.
-
- _S_e_e _A_l_s_o:
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- levels.
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-