I am trying to extract a value (' location ') based on the highest value in another column (' total_cases ') and assign it to highest_no_new
My previous dataframe where I want to extract the value from is called no_new_cases
I want to pick out the ' location ' with the highest number of ' total_cases ' from no_new_cases
I am able to access the highest number of ' total_cases ', but not the location:
highest_no_new = no_new_cases['total_cases'].max()
Please can you help return the 'location'?
Thanks in advance.
使用idxmax
:
df.loc[df['total_cases'].idxmax(), 'location']
You can use iloc
method:
df['highest_no_new'] = df.iloc[df.total_cases.argmax()]['location']
Example :
>>> d = {'location': [1, 2], 'total_cases': [3, 4]}
>>> df = pd.DataFrame(d)
>>> df
location total_cases
0 1 3
1 2 4
>>> df.iloc[df.total_cases.argmax()]['location']
2
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