human.chrom.info.May04 {aCGH} | R Documentation

## Basic Chromosomal Information for UCSC Human Genome Assembly May 2004 freeze

### Description

This dataset contains basic chromosomal information for UCSC Human Genome Assembly May 2004 freeze. human.chrom.info.May04 is loaded automatically with the aCGH package.

### Usage

    human.chrom.info.May04

### Format

A data frame with 24 observations on the following 3 variables.

chrom
  Chromosomal index, X is coded as 23 and Y as 24.
length
  Length of each chromosome in kilobases.
centromere
  Location of the centromere on the chromosome (kb).

### Details

This file is used for many plotting functions and needs to correspond to `clones.info` mapping file. The centromeric location is approximately extimated by taking mid-point between the last fish-mapped clone on the p-arm and the first fish-mapped clone on the q-arm using relevant UCSC freeze. For an alternative freeze, one needs to manually create a 3-column file of the format described above.

### Source

http://genome.ucsc.edu/cgi-bin/hgText

[Package aCGH version 1.6.0 Index]