def ising_bias_numpy(self):
        return 0.5 * self.boltzmann_bias.get_value() + \
            0.25 * self.layer_above.W.get_value().sum(axis=1)
.. todo::
dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/models/dbm/ising.py/BoltzmannIsingVisible.ising_bias_numpy