expand                package:Matrix                R Documentation

_E_x_p_a_n_d _a _D_e_c_o_m_p_o_s_i_t_i_o_n _i_n_t_o _F_a_c_t_o_r_s

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

     Expands decompositions stored in compact form into factors.

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

     expand(x, ...)

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

       x: a matrix decomposition.  

     ...: further arguments passed to or from other methods.

_D_e_t_a_i_l_s:

     This is a generic function with special methods for different
     types of decompositions. Use 'methods("expand")' to list all the
     methods for the 'expand' generic.

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

     the expanded decomposition.

_N_O_T_E:

     Factors for decompositions such as 'lu' and 'qr' can be stored in
     a compact form. The function 'expand' allows all factors to be
     fully expanded.

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

     'facmul'.

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

     library(Matrix)
     x <- Matrix( 1:9, 3, 3)
     expand(qr(x))

