kernels.py 文件源码

def getTestKernelDiag(self, params, Xtest):
        self.checkParams(params)        
        k = np.exp(params[0])
        M = 1.0 / (1.0 + k*self.D)
        Xtest_scaled = Xtest/np.sqrt(Xtest.shape[1])
        return np.diag((Xtest_scaled).dot(M).dot(Xtest_scaled.T))





#LD kernel with polynomial decay