Method _loss

svm_class/svm_smo.py:43–47

(self, X, Y)

    self.C = C

  def _loss(self, X, Y):
    # return -np.sum(self.alphas) + \
    #   0.5 * np.sum(np.outer(Y, Y) * self.kernel(X, X) * np.outer(self.alphas, self.alphas))
    return -np.sum(self.alphas) + \
      0.5 * np.sum(self.YYK * np.outer(self.alphas, self.alphas))

  def _take_step(self, i1, i2):
    # returns True if model params changed, False otherwise