说我有一个像这样的数据框:
gender height weight C
2000-01-01 male 42.849980 157.500553 1
2000-01-02 male 49.607315 177.340407 1
2000-01-03 male 56.293531 171.524640 1
2000-01-04 female 48.421077 144.251986 2
2000-01-05 male 46.556882 152.526206 2
2000-01-06 female 68.448851 168.272968 1
2000-01-07 male 70.757698 136.431469 2
2000-01-08 female 58.909500 176.499753 3
2000-01-09 female 76.435631 174.094104 3
2000-01-10 male 45.306120 177.540920 2
如何计算按height
列分组的列的平均值C
?这将产生3个不同的值:平均值与高度C=1
,即那些拥有C=2
,等等。
到目前为止,我尝试了一下,但无济于事:
df['height'].mean(groupby='C')
->退货 TypeError: mean() got an unexpected keyword argument 'groupby'
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我来说两句