行
res2.loc[: , other_column_name] = res2.loc[: , other_column_name].apply(np.log)
其中res2
是pandas.DataFrame
,给出以下警告:
SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_indexer,col_indexer] = value instead
经过几次尝试,我可以通过将行重写为此内容来摆脱警告
res3 = res2.copy()
log = res2.loc[: , other_column_name].apply(np.log)
res3.loc[: , other_column_name] = log
这显然不是一个很好的解决方案,有没有更好的方法来解决这个问题?
编辑1
res2
的创建方式如下:
res2 = res1[res1.index <= last_valid_sentiment]
也
res2.head()
sentiment inf_neg
2001-11-28 -2.856371 0.534482
2001-12-26 -2.023266 0.473392
2002-01-30 -1.505361 0.444845
2002-02-27 -2.121079 0.433922
2002-03-27 -1.692547 0.469621