MusicEmotionMachine.py 文件源码

def sigmoid_kernel(self, x, y, gamma):
    """
    Custom sigmoid kernel function, similarities of vectors in a sigmoid kernel matrix
    :param x: array of input vectors
    :param y: array of input vectors
    :param gamma: gamma
    :returns:
      - sk: inner product
    """
        c = 1

        sk = ssd(x, y.T, dense_output = True)

        sk *= gamma

        sk += c

        np.tanh(np.array(sk, dtype='float64'), np.array(sk, dtype = 'float64'))
        return np.array(sk, dtype = 'float64')