hgu133aCHR {hgu133a}R Documentation

Mappings between probe identifiers and the chromosome numbers the genes represented by the probe ids reside


Each chromosome of a given organism is assigned a number or letter for labeling purpose. hgu133aCHR maps probe ids to the numbers or letters labeling chromosomes where the genes corresponding to the probe ids reside


Since a given gene may be found in more than one chromosomes, each probe id is mapped to a character vector of length 1 or greater. Probe ids that can not be mapped to any chromosome at the time when the package was built are assinged NAs.

Mappings were based on data provided by:

LocusLink:ftp://ftp.ncbi.nih.gov/refseq/LocusLink/LL_tmpl.gz. Built: September 15, 2004

Package built: Wed Sep 15 18:48:08 2004


        # Convert to a list
        xx <- as.list(hgu133aCHR)
        # 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
            # Get the first one

[Package hgu133a version 1.6.5 Index]