Gets the indices of units by their names.
# S3 method for UnitNamesFile
indexOf(this, pattern=NULL, names=NULL, ...)Returns a vector of integers in [1,N] where N is the number of units
in the underlying annotation chip type file.
A pattern to be used for identifying unit names of
interest. If NULL, no regular expression matching is done.
Names to be match exactly to the unit names.
Not used.
Henrik Bengtsson
*getUnitNames().
For more information see UnitNamesFile.