hgu95av2CHRLOC           package:hgu95av2           R Documentation

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_D_e_s_c_r_i_p_t_i_o_n:

     hgu95av2CHRLOC maps probe ids to the starting positions of the
     genes represented by the probe ids on chromosomes. The position of
     a gene is measured as the number of base pairs.

_D_e_t_a_i_l_s:

     Chromosomal locations on both the sense and antisense strands are
     measured as the number of base pairs from the p (5' end of the
     sense strand) to q (3' end of the sense strand) arms. Chromosomal
     locations on the antisense strand have a leading "-" sign (e. g.
     -1234567). NAs are assigned to probe ids whose chromosomal
     locations are not known.

     Since a given gene may have more than one chromosomal locations,
     each probe id is mapped to a named vector of length 1 or greater.
     The names of each vector give the chromosome number where the
     genes reside. When a gene can be mapped to a given chromosome but
     the exact location of the gene can not be determined with
     confidence, "random" is appended to the end of the name for a
     chromosomal location value.     

     Mappings were based on data provided by:

     Golden Path:<URL:
     http://hgdownload.cse.ucsc.edu/goldenPath/hg17/database/>. Built:
     hg17

     Package built Wed Jan 12 16:57:23 2005

_E_x_a_m_p_l_e_s:

         # Covert to a list
         xx <- as.list(hgu95av2CHRLOC)
         # Remove probe ids that do not map to any CHRLOC
         xx <- xx[!is.na(xx)]
         if(length(xx) > 0){
             # Gets the location for the first five probes
             xx[1:5]
             # Gets the first one
             xx[[1]]
         }

