456b9ed099cc5f7e99880371ac9d1924095769f3,GPflow/transforms.py,Log1pe,backward,#Log1pe#Any#,139

Before Change

        return -tf.reduce_sum(tf.log(1. + tf.exp(-x)))

    def backward(self, y):
        result = np.log(np.exp(y - self._lower) - np.ones(1, np_float_type))
        return np.where(y > 35, y-self._lower, result)

    def __str__(self):
        return "+ve"

After Change

    def backward(self, y):
        ys = np.maximum(y-self._lower, np.finfo(np_float_type).eps)
        return ys + np.log(-np.expm1(-ys))

    def __str__(self):
        return "+ve"

Instances