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padasの基本的なtips

Last updated at Posted at 2018-08-05

df_new=df_old['A']とすると、列名が消えるが、df_new=df_old[['A']]とすると残る。

dfで特定の条件を満たさない値をnaにしてしまう方法

df_ret[~((df_ret < 0.3) & (df_ret > -0.3))]=np.nan
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