org.Hs.egCHR          package:org.Hs.eg.db          R Documentation

_M_a_p _E_n_t_r_e_z _G_e_n_e _I_D_s _t_o _C_h_r_o_m_o_s_o_m_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     org.Hs.egCHR is an R object that provides mappings between entrez
     gene identifiers and the chromosome that contains the gene of
     interest.

_D_e_t_a_i_l_s:

     Each entrez gene identifier maps to a vector of a chromosome. 

     Mappings were based on data provided by: Entrez Gene (
     ftp://ftp.ncbi.nlm.nih.gov/gene/DATA ) on 2008-Apr2

_E_x_a_m_p_l_e_s:

             x <- org.Hs.egCHR
             # Get the entrez gene identifiers that are mapped to a chromosome
             mapped_genes <- mappedkeys(x)
             # Convert to a list
             xx <- as.list(x[mapped_genes])
             if(length(xx) > 0) {
               # Get the CHR for the first five genes
               xx[1:5]
               # Get the first one
               xx[[1]]
             }

