gahgu133bGENESTART         package:gahgu133b         R Documentation

_M_a_p _c_u_s_t_o_m _p_r_o_b_e_s_e_t _I_D_s _t_o _g_e_n_e _s_t_a_r_t _p_o_s_i_t_i_o_n

_D_e_s_c_r_i_p_t_i_o_n:

     gahgu133bGENESTART is an R environment that provides mappings
     between a custom probeset identifier and the base pair starting
     position of gene onto corresponding chromosome.

_D_e_t_a_i_l_s:

     Each identifier maps to a gene start position. If the gene start
     position is unknown, the vector will contain an 'NA'.

     Mappings were based on data provided by:

     GeneCards database - www.genecards.org

     Package built: Mon Feb 25 23:34:49 2008

_R_e_f_e_r_e_n_c_e_s:

     <URL: www.genecards.org>

_E_x_a_m_p_l_e_s:

             # Convert to a list
             xx <- as.list(gahgu133bGENESTART)
             # Remove probe identifiers that do not map to any gene start position
             xx <- xx[!is.na(xx)]
             if(length(xx) > 0){
                 # Get the base pair number for gene start position for the first five probes
                 xx[1:5]
                 # Get the first one
                 xx[[1]]
             }

