fitFDist                package:limma                R Documentation

_M_o_m_e_n_t _E_s_t_i_m_a_t_i_o_n _o_f _S_c_a_l_e_d _F-_D_i_s_t_r_i_b_u_t_i_o_n

_D_e_s_c_r_i_p_t_i_o_n:

     Moment estimation of the parameters of a scaled F-distribution
     given one of the degrees of freedom. This function is called
     internally by 'ebayes' and is not usually called directly by a
     user.

_U_s_a_g_e:

     fitFDist(x,df1)

_A_r_g_u_m_e_n_t_s:

       x: numeric vector or array of positive values representing a
          sample from an F-distribution.

     df1: the first degrees of freedom of the F-distribution. May be an
          integer or a vector of the same length as 'x'.

_D_e_t_a_i_l_s:

     The function estimates 'scale' and 'df2' under the assumption that
     'x' is distributed as 'scale' times an F-distributed random
     variable on 'df1' and 'df2' degrees of freedom.

_V_a_l_u_e:

     A list containing the components 

   scale: scale factor for F-distribution

     df2: the second degrees of freedom of the F-distribution

_A_u_t_h_o_r(_s):

     Gordon Smyth

_S_e_e _A_l_s_o:

     'ebayes', 'trigammaInverse'