The skewr package is a tool for visualizing the output of the Illumina Human Methylation 450k BeadChip to aid in quality control. It creates a panel of nine plots. Six of the plots represent the density of either the methylated intensity or the unmethylated intensity given by one of three subsets of the 485,577 total probes. These subsets include Type Ired, Type Igreen, and Type II.The remaining three distributions give the density of the Betavalues for these same three subsets. Each of the nine plots optionally displays the distributions of the "rs" SNP probes and the probes associated with imprinted genes as series of 'tick' marks located above the xaxis.
Package details 


Author  Ryan Putney [cre, aut], Steven Eschrich [aut], Anders Berglund [aut] 
Bioconductor views  DNAMethylation Preprocessing QualityControl TwoChannel 
Maintainer  Ryan Putney <ryanputney@gmail.com> 
License  GPL2 
Version  1.8.0 
Package repository  View on Bioconductor 
Installation 
Install the latest version of this package by entering the following in R:

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