[英].groupby .agg does not work as expected in python
My dataframe is like:我的数据框是这样的:
I used the following code to calculate the sum, mean and std of a column for each group, but it gave me an error.我使用以下代码计算每个组的列的总和、均值和标准差,但它给了我一个错误。
New11.groupby(level=0)['Population'].agg([np.sum,np.mean,np.std])
DataError: No numeric types to aggregate
However, the following code worked fine.但是,以下代码运行良好。
New11.groupby(level=0)['Population'].agg([np.sum])
This code gives an error.此代码给出了错误。
New11.groupby(level=0)['Population'].agg([np.average])
AttributeError: 'float' object has no attribute 'dtype'
How should I modify my code to make it work?我应该如何修改我的代码以使其工作?
Please try convert the values of 'Population' in float32 of the next form New11['Population]=np.float32(New11['Population'])
.请尝试在下一个形式
New11['Population]=np.float32(New11['Population'])
float32 中转换 'Population' 的值。 You can check this in the documentation您可以在文档中查看
尝试
New11.groupby(level=0).agg({'Population': ['sum', 'mean', 'std']})
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