lmrdia                package:lmomco                R Documentation

_L-_m_o_m_e_n_t _R_a_t_i_o _D_i_a_g_r_a_m _C_o_m_p_o_n_e_n_t_s

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

     This function returns a list of the L-skew and L-kurtosis (tau_3
     and tau_4,  respectively) ordinates for construction of L-moment
     Ratio (L-moment diagrams)  that are useful in selecting a
     distribution to model the data.

_U_s_a_g_e:

     lmrdia()

_V_a_l_u_e:

     An R 'list' is returned.

  limits: The theoretical limits of tau_3 and tau_4-below tau_4 are
          theoretically not possible.

     exp: tau_3 and tau_4 of the Exponential distribution.

     gam: tau_3 and tau_4 of the Gamma distribution.

     gev: tau_3 and tau_4 of the Generalized Extreme Value
          distribution.

     glo: tau_3 and tau_4 of the Generalized Logistic distribution.

     gpa: tau_3 and tau_4 of the Generalized Pareto distribution.

     gum: tau_3 and tau_4 of the Gumbel distribution.

lognormal: tau_3 and tau_4 of the Lognormal distribution.

     nor: tau_3 and tau_4 of the Normal distribution.

     pe3: tau_3 and tau_4 of the Pearson Type III distribution.

 uniform: tau_3 and tau_4 of the uniform distribution.

_A_u_t_h_o_r(_s):

     W.H. Asquith

_R_e_f_e_r_e_n_c_e_s:

     Hosking, J.R.M., 1990, L-moments-Analysis and estimation of
     distributions using linear combinations of order statistics:
     Journal of the Royal Statistical Society, Series B, vol. 52, p.
     105-124.

     Hosking, J.R.M., 1996, FORTRAN routines for use with the method of
     L-moments: Version 3, IBM Research Report RC20525, T.J. Watson
     Research Center, Yorktown Heights, New York.

     Hosking, J.R.M. and Wallis, J.R., 1997, Regional frequency
     analysis-An approach based on L-moments: Cambridge University
     Press.

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

     'plotlmrdia'

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

     lratios <- lmrdia()

