更新 function.py

function.py

@@ -52,6 +52,11 @@ def classify(input_vector, dataSet, labels, k=1):
     """
     # 计算数据集的协方差矩阵
     covariance_matrix = np.cov(dataSet, rowvar=False)
+    
+    # 添加正则化项，防止协方差矩阵奇异
+    regularization_term = 1e-5 * np.eye(covariance_matrix.shape[0])
+    covariance_matrix += regularization_term
+    
     # 计算协方差矩阵的逆
     inv_covariance_matrix = np.linalg.inv(covariance_matrix)