hgu95av2CHRLOC {hgu95av2} | R Documentation |
hgu95av2CHRLOC mappes probe ids to chromosomal locations (measured as number of base pairs from the p arm) for genes corresponding to the probe ids.
This is an environment object with key and value pairs. Keys are probe ids and values are their corresponding chromosomal locations. NAs assigned to probe ids whose chromosomal locations are not known. Values are named vectors of length 1 or more depending on whether a given probe id can be mapped to a single or multiple locations on one or more than onw chromosomes. The names of the vectors give the chromosome number of concern. Names for chromosomal locations on the antisense strand have a leading "-" sign (e. g. -1234567). Chromosomal locations on both the sense and antisense strand 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. When a gene can not be placed on a chromosome with confidence, "random" is appended to the end of the name for a chromosomal location value.
Mappings were based on data provided by:
Human Genome Project built: hg16.http://www.genome.ucsc.edu/goldenPath/hg16
Package built Wed Mar 3 16:27:29 2004
http://www.genome.ucsc.edu/goldenPath/hg16/database/
# 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]] }