gahgu133plus2STRAND      package:gahgu133plus2      R Documentation

_M_a_p _c_u_s_t_o_m _p_r_o_b_e_s_e_t _I_D_s _t_o _s_t_r_a_n_d _o_n _c_h_r_o_m_o_s_o_m_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     gahgu133plus2STRAND is an R environment that provides mappings
     between a custom probeset identifier and the strand of gene onto
     corresponding chromosome.

_D_e_t_a_i_l_s:

     Each identifier maps to a gene strand. If the gene strand 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 23:53:26 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(gahgu133plus2STRAND)
             # Remove probe identifiers that do not map to any strand
             xx <- xx[!is.na(xx)]
             if(length(xx) > 0){
                 # Get the base pair number for gene strand for the first five probes
                 xx[1:5]
                 # Get the first one
                 xx[[1]]
             }

