psmeans                package:LMGene                R Documentation

_F_u_n_c_t_i_o_n _t_o _t_a_k_e _m_e_a_n_s _o_f _p_r_o_b_e_s_e_t_s.

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

     This is used to estimate expression levels of genes based on the
     measurements for the relevant probes.

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

     psmeans(eS, ind)

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

      eS: A transformed, normalized expression set. 

     ind: A vector used to indicate which probes go into which
          probesets. 

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

     The vector ind has form like c(1,1,1,2,2,2,2,3,3,4,4,4,...) Each
     entry corresponds to one probe and tells the number of the
     probeset it belongs to.

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

     Returns an expression set with the same vlist as eS, but the
     matrix rows now correspond to probesets instead of individual
     probes.

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

     John Tillinghast

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

     data(sample.eS)
     data(sample.ind)
     transeS (sample.eS, 667, 65) -> trs.eS
     lnormeS(trs.eS) -> ntrs.eS
     psmeans (ntrs.eS, sample.ind) -> genesample.eS

