sampford                 package:pps                 R Documentation

_S_a_m_p_f_o_r_d'_s _P_P_S _s_a_m_p_l_i_n_g _m_e_t_h_o_d

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

     Use Sampford's method to select a PPS sample of units

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

     sampford(size,n)

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

    size: A vector of the sizes of the units in the population

       n: The sample size

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

     Returns the indices of the units that were selected in the sample

_N_o_t_e:

     The function 'sampfordpi' can be used to compute joint inclusion
     probabilities for this method. See the user's guide, pps.pdf, for
     more information.

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

     size <- c(9,2,5,17,4,21,15,7,4,11,23,23,14)
     sampleindices <- sampford(size,4)

