sscCrosstab              package:Matrix              R Documentation

_C_r_e_a_t_e _p_a_i_r_w_i_s_e _c_r_o_s_s_t_a_b_u_l_a_t_i_o_n

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

     Create the pairwise crosstabulation of two or more factors and
     store it as an object of class '"sscCrosstab"' which consists of a
     symmetric, sparse, positive semidefinite matrix, a vector of the
     counts of the levels in each factor, and, optionally, a
     permutation and inverse permutation that will minimize fill-in in
     the Cholesky decomposition of this matrix while maintaining
     separation of the groups of columns corresponding to different
     factors.

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

     sscCrosstab(flist, upper = TRUE)

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

   flist: A list of two or more factors.  All factors must have the
          same length.

   upper: logical - if 'TRUE' the upper triangle of the pairwise
          cross-tabulation matrix is computed and returned.  Otherwise
          the lower triangle is returned.  Defaults to 'TRUE'.

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

     An object of class '"sscCrosstab"'.

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

     'sscCrosstab-class'

