dqn_utils.py 文件源码

def huber_loss(x, delta=1.0):
    # https://en.wikipedia.org/wiki/Huber_loss
    return tf.select(
        tf.abs(x) < delta,
        tf.square(x) * 0.5,
        delta * (tf.abs(x) - 0.5 * delta)
    )