@grammar((float, int))
    def exponent(value):
Sorts an array "by rows".  This differs from the Numeric.sort() function,
dataset/ETHPy150Open wrobstory/vincent/vincent/scales.py/Scale.exponent--crossover with--dataset/ETHPy150Open sunlightlabs/clearspending/completeness/statlib/pstat.py/asortrows