as.matrix               package:limma               R Documentation

_T_u_r_n _a _M_i_c_r_o_a_r_r_a_y _D_a_t_a _O_b_j_e_c_t _i_n_t_o _a _M_a_t_r_i_x

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

     Turn a microarray data object into a numeric matrix by extracting
     the expression values.

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

     ## S3 method for class 'MAList':
     as.matrix(x)

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

       x: an object of class 'RGList', 'MAList', 'MArrayLM',
          'marrayNorm' or 'exprSet'

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

     These methods extract the matrix of log-ratios, for 'MAList' or
     'marrayNorm' objects, or the matrix of expression values for
     'exprSet' objects. For 'MArrayLM' objects, the matrix of fitted
     coefficients is extracted.

     These methods involve loss of information, so the original data
     object is not recoverable.

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

     A numeric matrix.

_A_u_t_h_o_r(_s):

     Gordon Smyth

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

     'as.matrix' in the base package.

     2.Classes gives an overview of data classes used in LIMMA.

