假设我有一个如下所示的数据框:
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
我该如何计算按列
C
分组的 height
列均值? 这将得到三个不同的值: C=1
的高度平均值,C=2
的高度平均值等等。到目前为止,我尝试了这个方法,但没有成功:
df.groupby('C')['height'].mean()
-> 返回 TypeError: mean() got an unexpected keyword argument 'groupby'
df.groupby('C')['height'].mean()
吗? - EdChum