method
a string to specify the methods used for binarizing the data. When it is "universal", an
universal threshold is used. In such case, another parameter threshold can only be one of "100nM", "1000nM",
and "10000nM". When it is "drug-specific", the threshold used for binarization depends on each drug and
the parameter threshold can be only one of "10fold", "50fold", and "100fold".