Change in version 2.31.2
  * reformat NEWS file

Change in version 2.31.1
  * update DESCRIPTION: maintainer's email address; exclude 'Biobase' and 'survival' from "Imports"
  * update NAMESPACE: add "Import(Biobase)"
  * fixed a bug in trans.R: the 'diff' in "tmp > 1 || diff < eps" is a vector
  * revised visual.R: shorten strings in 'mytitle'
  * change Weiliang's email address in all .Rd files
  * revised plotHistDensity.Rd: shorten strings in 'mytitle'
