qcMDS: This function plots the sample relations based on multidimensional scaling using the plotMDS.dge edgeR function
Description
This function is a variation on the usual multdimensional scaling
(or principle coordinate) plot, in that a distance measure
particularly appropriate for the digital gene expression (DGE)
context is used. The distance between each pair of samples
(columns) is the square root of the common dispersion for the top
genes which best distinguish that pair of samples. These
top genes are selected according to the tagwise
dispersion of all the samples.