hgu2beta7CHR {hgu2beta7} | R Documentation

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

### Description

Each chromosome of a given organism is assigned a number or letter for labeling purpose. hgu2beta7CHR maps probe ids to the numbers or letters labeling chromosomes where the genes corresponding to the probe ids reside

### Details

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: February 16, 2005

Package built: Wed Feb 16 23:32:20 2005

### Examples

            # Convert to a list
            xx <- as.list(hgu2beta7CHR)
            # 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]]
            }

[Package hgu2beta7 version 1.2.0 Index]