当我使用下面的日志函数时，我在 jupyter 笔记本中收到以下错误消息。data1 = np.log(mdata).diff().dropna() 我尝试进行强制转换但无法摆脱这个问题。-------------------------------------------------- ------------------------- AttributeError Traceback（最近一次调用最后） AttributeError：'str'对象没有属性'log'
The above exception was the direct cause of the following exception:
TypeError Traceback (most recent call last)
<ipython-input-13-b6f1878a7619> in <module>
----> 1 data1 = np.log(mdata).diff().dropna()
TypeError: loop of ufunc does not support argument 0 of type str which has no callable log method
元数据：
Field1 Field2 Field3 Field4
TS
2020-11-02 00:43:58.500 1595000 849332 205 69
2020-11-02 00:43:58.500 1408000 820332 198 51
2020-11-02 00:43:58.500 1770000 926054 213 56
2020-11-02 00:43:58.500 1760000 …