Take log base 2 of Expression
Description
Take log base 2 of the expression matrix in an
ExpressionSet
Usage
1  exprset.log(exprset)

Arguments
exprset 

Details
This functions takes log base 2 of the expression matrix in an
ExpressionSet
. Negatives
are converted to the smallest nonnegative entry.
Value
An ExpressionSet
Author(s)
Rafael A. Irizarry