我正在嘗試將 NaN 替換train_df為dff. 我不明白我做錯了什么。train_df.replace(to_replace = train_df["Age"].values , value = dff["Age"].values , inplace = True , regex = False , limit = None)dff.Age.mean()輸出:30.128401985359698train_df.Age.mean()輸出:28.96758312013303
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