pdmatrix-class             package:lme4             R Documentation

_P_o_s_i_t_i_v_e-_d_e_f_i_n_i_t_e _m_a_t_r_i_c_e_s

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

     The class of positive-definite, symmetric 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("pdmatrix",
     ...)'. More frequently they are created by coercing a `pdMat'
     object to the `pdmatrix' class.

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

     `._D_a_t_a': Object of class `"matrix"', which should be a numeric
          matrix.

_E_x_t_e_n_d_s:

     Class `"matrix"', from data part. Class `"structure"', by class
     "matrix". Class `"array"', by class "matrix". Class `"vector"', by
     class "matrix".

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

     _c_o_e_r_c_e `signature(from = "pdDiag", to = "pdmatrix")': extract the
          positive-definite matrix 

     _c_o_e_r_c_e `signature(from = "pdIdent", to = "pdmatrix")': extract the
          positive-definite matrix

     _c_o_e_r_c_e `signature(from = "pdLogChol", to = "pdmatrix")': extract
          the positive-definite matrix

     _c_o_e_r_c_e `signature(from = "pdNatural", to = "pdmatrix")': extract
          the positive-definite matrix

     _c_o_e_r_c_e `signature(from = "matrix", to = "pdmatrix")': create a
          `pdmatrix' object from a matrix (does not check for symmetry
          or positive-definiteness)

     _c_o_e_r_c_e `signature(from = "pdfactor", to = "pdmatrix")': create a
          positive-definite matrix as the crossproduct of the factor.

     _c_o_e_r_c_e `signature(from = "pdmatrix", to = "pdfactor")': convert a
          `pdmatrix' object to its Cholesky factor

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

     `pdfactor-class', `pdMat-class'

