def exp(self):
        return self.copy(np.exp(self.data))
RS without known primary. Update from a non-primary's response.
dataset/ETHPy150Open gallantlab/pycortex/cortex/dataset.py/VolumeData.exp--crossover with--dataset/ETHPy150Open mongodb/mongo-python-driver/pymongo/topology_description.py/_update_rs_no_primary_from_member