#测试数据
import numpy as np
features_train = np.array([[-1, -1], [-2, -1], [-3, -2], [1, 1], [2, 1], [3, 2]])features_train = np.arra
#测试数据
import numpy as np
features_train = np.array([[-1, -1], [-2, -1], [-3, -2], [1, 1], [2, 1], [3, 2]])features_train = np.arra