diff --git a/function.py b/function.py
index c71b74c..6ebd621 100644
--- a/function.py
+++ b/function.py
@@ -78,7 +78,13 @@ def load_data(filepath):
     - np.array: 特征数据。
     - np.array: 标签数据。
     """
-    data = np.loadtxt(filepath, delimiter=',')
+    # 使用dtype=str先将所有数据加载为字符串
+    data = np.loadtxt(filepath, delimiter=' ', dtype=str)
+
+    # 替换'?'为np.nan，并转换为浮点数
+    data[data == '?'] = np.nan
+    data = data.astype(float)
+
     X = data[:, :-1]  # 假设最后一列是标签
     y = data[:, -1]
     return X, y
@@ -90,7 +96,11 @@ if __name__ == "__main__":
     # 加载测试集
     X_test, y_test = load_data("./data/horse-colic.test")
 
-    # 确保标签为浮点型，以防止整型溢出
+    # 处理缺失值，例如用列的均值替代
+    X_train = np.nan_to_num(X_train, nan=np.nanmean(X_train, axis=0))
+    X_test = np.nan_to_num(X_test, nan=np.nanmean(X_train, axis=0))  # 用训练集的均值替代测试集
+
+    # 确保标签为浮点型
     y_train = y_train.astype(float)
     y_test = y_test.astype(float)