

Gamma Count(rmutil)                          R Documentation

_T_h_e _G_a_m_m_a _C_o_u_n_t _D_i_s_t_r_i_b_u_t_i_o_n

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

     dgammacount(y, m, s)
     pgammacount(q, m, s)

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

       y: vector of frequencies

       q: vector of quantiles

       m: vector of probabilities

       s: vector of overdispersion parameters

_V_a_l_u_e_:

     These functions provide information about the gamma
     count distribution with parameters `m' and `s'. `dgam-
     macount' gives the density and `pgammacount' gives the
     distribution function.

     The gamma count distribution with `prob' = m has den-
     sity

       p(y) = pgamma(m s, y s, 1)-pgamma(m s, (y+1) s, 1)

     for y = 0, ..., n where pgamma(m s, 0, 1)=1.

_A_u_t_h_o_r_(_s_)_:

     J.K. Lindsey

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

     `dpois' for the Poisson, `ddoublepois' for the double
     Poisson, and `dmultpois' for the multiplicative Poisson
     distributions.

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

     dgammacount(5,5,0.9)
     pgammacount(5,5,0.9)

