def aF_value (ER,EF,dfR,dfF):
    return ((ER-EF)/float(dfR-dfF) / (EF/float(dfF)))
Assumes volumes-from an image with a volume of the same name as self.shared_name
dataset/ETHPy150Open radlab/sparrow/src/main/python/third_party/stats.py/aF_value--crossover with--dataset/ETHPy150Open realestate-com-au/harpoon/harpoon/option_spec/image_objs.py/Persistence.make_second_dockerfile