drosophila2CHR          package:drosophila2          R Documentation

_M_a_p _M_a_n_u_f_a_c_t_u_r_e_r _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:

     drosophila2CHR is an R environment that provides mappings between
     a manufacturer id and the chromosome that contains the gene of
     interest.

_D_e_t_a_i_l_s:

     Each manufacturer id maps to a vector of chromosomes. Due to
     inconsistencies that may exist at the time the environment was
     built, the vector may contain more than one chromosome (e.g., the
     id may map to more than one chromosome). If the chromosomal
     location is unknown, the vector will contain an 'NA'.

     Mappings were based on data provided by:

     Entrez Gene:<URL:
     http://gopher5/compbio/annotationSourceData/ftp.ncbi.nlm.nih.gov/g
     ene/DATA/>. Built: Source data downloaded from Entrez Gene on Tue
     Oct  4 19:12:31 2005

     Package built: Tue Oct  4 19:17:45 2005

_E_x_a_m_p_l_e_s:

             # Convert to a list
             xx <- as.list(drosophila2CHR)
             # Remove probe ids that do not map to any CHRLOC
             xx <- xx[!is.na(xx)]
             if(length(xx) > 0){
                 # Get the chromosome number for the first five probes
                 xx[1:5]
                 # Get the first one
                 xx[[1]]
             }

