lmeRep-class             package:Matrix             R Documentation

_l_m_e _m_o_d_e_l_s _r_e_p_r_e_s_e_n_t_a_t_i_o_n

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

     A representation of a linear mixed-effects model using a
     combination of sparse, symmetric, column-oriented matrices and
     dense matrices.

_O_b_j_e_c_t_s _f_r_o_m _t_h_e _C_l_a_s_s:

     Objects can be created by calls of the form 'new("lmeRep", ...)'
     or, more commonly, via the 'lme1' function.

_S_l_o_t_s:

     '_O_m_e_g_a': A list of numeric matrices providing the components of
          symmetric, positive-definite matrix Omega.  Only the upper
          triangle of each component is used and stored.

     '_D': A list of the diagonal factors (lower triangle) in the LDL'
          decomposition of Z'Z+W.

     '_T': A list of objects of class 'cscMatrix' providing the pairwise
          cross-tabulation of the grouping factors.

     '_Z_Z_x': A list of arrays comprising ZtZ

     '_R_X_X': A matrix which is the (augmented) RXX component or the
          corresponding component from the inverse of Z'Z+W

     '_R_Z_X': A matrix which is the (augmented) RZX component or the
          corresponding component from the inverse of Z'Z+W

     '_X_t_X': The original X'X matrix

     '_Z_t_X': The original Z'X matrix

     '_c_n_a_m_e_s': Column names of the model matrices.

     '_d_e_v_i_a_n_c_e': Numeric vector of length 2 containing the deviance
          corresponding to the maximum likelihood (ML) and REML
          criteria.  This slot's contents are current if
          'status$factored' is 'TRUE'.

     '_d_e_v_C_o_m_p': Numeric vector of length 4 giving the components used
          to calculate the deviance. This slot's contents are current
          if 'status$factored' is 'TRUE'.

     '_l_e_v_e_l_s': List of the levels of the grouping factors

     '_n_c': Integer vector with the number of columns in (augmented)
          model matrices and the number of observations in the model
          frame.

     '_s_t_a_t_u_s': Logical vector of length 2 indicating if the object has
          been factored and if the factorization has been inverted.

_M_e_t_h_o_d_s:

     _c_h_o_l 'signature(x = "lmeRep", pivot = "ANY")': Factor the matrix
          Z'Z+W

     _c_o_e_f 'signature(object = "lmeRep")': Extract the parameters that
          determine the Omega matrices.  The optional logical argument
          'unconstr' determines the constrained or unconstrained
          parameterization.

     _c_o_e_f<- 'signature(object = "lmeRep", value = "numeric")': Assign
          the parameters that determine the Omega matrices.  The
          optional logical argument 'unconstr' determines the
          constrained or unconstrained parameterization. 

     _s_o_l_v_e 'signature(a = "lmeRep", b = "missing")': Invert the
          decomposed matrices.

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

     'sscCrosstab-class', 'sscMatrix-class', 'tscMatrix-class'

