GetPracticalRange        package:RandomFields        R Documentation

_D_e_t_e_r_m_i_n_a_t_i_o_n _o_f _t_h_e _p_r_a_c_t_i_c_a_l _r_a_n_g_e

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

     the function returns the practical range of a covariance model,
     i.e. the distance for which the model with standard parameters
     (`variance=1', `nugget=0', `scale=1') values 0.05

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

     GetPracticalRange(model, kappas=NULL)

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

   model: string; covariance model, see `CovarianceFct', or type
          `PrintModelList()' to get all options.

  kappas: additional parameters of a parametrised model, see
          `CovarianceFct'.

_D_e_t_a_i_l_s:

     In case the practical range has to be determined numerically, only
     a rough approximation is provided.

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

     real number (the practical range)

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

     Martin Schlather, Martin.Schlather@uni-bayreuth.de <URL:
     http://www.geo.uni-bayreuth.de/~martin>

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

     Goovaerts, P. (1997) Geostatistics for Natural Resources
     Evaluation. New York: Oxford University Press.

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

     `CovarianceFct', `RandomFields', `RFparameters',

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

     GetPracticalRange("exponential")
     GetPracticalRange("whittlematern",kappa=2)
     GetPracticalRange("gengneiting",kappa=c(a=3,b=5))

