HR                  package:survey                  R Documentation

_W_r_a_p_p_e_r_s _f_o_r _s_p_e_c_i_f_y_i_n_g _P_P_S _d_e_s_i_g_n_s

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

     The Horvitz-Thompson estimator and the Hartley-Rao approximation
     require information in addition to the sampling probabilities for
     sampled individuals.  These functions allow this information to be
     supplied.

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

     HR(psum=NULL, strata = NULL)
     ppsmat(jointprob, tolerance = 1e-04) 

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

    psum: The sum of squared sampling probabilities for the population,
          divided by the sample size, as a single number or as a vector
          for stratified sampling 

  strata: Stratum labels, of the same length as 'psum', if 'psum' is a
          vector 

jointprob: Matrix of pairwise sampling probabilities for the sampled
          individuals

tolerance: Tolerance for deciding that the covariance of sampling
          indicators is zero

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

     An object of class 'HR' or 'ppsmat', suitable for supplying as the
     'pps' argument to 'svydesign'.

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

     election for examples of PPS designs

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

     HR(0.1)

