p2LL                package:annotate                R Documentation

_A _f_u_n_c_t_i_o_n _t_o _m_a_p _f_r_o_m _p_r_o_b_e_s _t_o _u_n_i_q_u_e _E_n_t_r_e_z _G_e_n_e _I_D_s

_D_e_s_c_r_i_p_t_i_o_n:

     For any chip, this function computes the map from  unique Entrez
     Gene ID to all probes.

_U_s_a_g_e:

     p2LL(data)

_A_r_g_u_m_e_n_t_s:

    data: The character string naming the chip. 

_D_e_t_a_i_l_s:

     This is essentially the computation of the reverse map, we store
     probe to Entrez gene information in the 'ENTREZID' environment.
     This is used to compute the inverse mapping.

_V_a_l_u_e:

     A list, with length equal to the number of unique Entrez Gene IDs
     on the chip, the elements correspond to the probes that map to the
     Gene ID.

_A_u_t_h_o_r(_s):

     R. Gentleman

_S_e_e _A_l_s_o:

     'getLL'

_E_x_a_m_p_l_e_s:

      if( require("hgu95av2") ) {
      x = p2LL("hgu95av2")
      table(sapply(x, length))
     }