Created
May 9, 2020 20:31
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Group DataFrame by weekday
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df['weekday_num'] = pd.DatetimeIndex(df['date_of_birth']).weekday | |
df['weekday_name'] = pd.DatetimeIndex(df['date_of_birth']).weekday_name | |
df_grouped = (df.groupby(['weekday_num', 'weekday_name']) | |
.size() | |
.reset_index(name="n_pets")) | |
df_grouped |
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mmm maybe we are using different versions?
This is a part of a blog post - https://codeburst.io/plotting-with-pandas-dates-and-bar-plots-227f25351274
Not sure what my version was when I wrote this, but according to this it should be working: https://pandas.pydata.org/docs/reference/api/pandas.DatetimeIndex.html