qr-methods              package:Matrix              R Documentation

_M_e_t_h_o_d_s _f_o_r _t_h_e _q_r _g_e_n_e_r_i_c

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

     The '"Matrix"' package provides methods for the QR decomposition
     of  special classes of matrices.  The generic function is 'qr' but
     methods defined in this package can take extra arguments.  In
     particular there is an option for determining a fill-reducing
     permutation of the columns of a sparse, rectangular matrix.

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

     _x = "_d_g_C_M_a_t_r_i_x" QR decomposition of a general sparse
          double-precision matrix with 'nrow(x) >= ncol(x)'.  Returns
          an object of class '"sparseQR"', see 'sparseQR'.

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

     'qr', 'sparseQR', 'dgCMatrix'

