MusicEmotionMachine.py 文件源码

def polynomial_kernel(self, x, y, gamma):
    """
    Custom polynomial kernel function, similarities of vectors over polynomials
    :param x: array of input vectors
    :param y: array of input vectors
    :param gamma: gamma
    :returns:
      - pk: inner product
    """
        c = 1
        degree = 2

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

        pk *= gamma

        pk += c

        pk **= degree
        return pk