drosgenome1CHR {drosgenome1.db} | R Documentation

## Map Manufacturer IDs to Chromosomes

### Description

drosgenome1CHR is an R object that provides mappings between a manufacturer identifier and the chromosome that contains the gene of interest.

### Details

Each manufacturer identifier maps to a vector of chromosomes. Due to inconsistencies that may exist at the time the object was built, the vector may contain more than one chromosome (e.g., the identifier 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 ( ftp://ftp.ncbi.nlm.nih.gov/gene/DATA ) on 2009-Mar11

### Examples

            x <- drosgenome1CHR
            # Get the probe identifiers that are mapped to a chromosome
            mapped_probes <- mappedkeys(x)
            # Convert to a list
            xx <- as.list(x[mapped_probes])
            if(length(xx) > 0) {
              # Get the CHR for the first five probes
              xx[1:5]
              # Get the first one
              xx[[1]]
            }

[Package drosgenome1.db version 2.2.11 Index]