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我DF看起來是這樣的:熊貓重採樣季度與顯示的開始和結束一個月
Total
language Julia Python R SQLite
date
2015-03-01 NaN NaN 17.0 NaN
2015-04-01 NaN 156.0 189.0 NaN
2015-05-01 13.0 212.0 202.0 NaN
該指數是按月,我想這是每季度:
df.resample("Q").sum()
給我這樣的:
Total
language Julia Python R SQLite
date
2015-03-31 NaN NaN 17.0 NaN
2015-06-30 22.0 677.0 594.0 26.0
2015-09-30 37.0 1410.0 1250.0 146.0
但是我想表明這樣Start month - End month 2017
而不是結束日期索引。期望的df:
Total
language Julia Python R SQLite
Jan - Mar, 2015 NaN NaN 17.0 NaN
Apr - Jun, 2015 22.0 677.0 594.0 26.0
Jul - Sep, 2015 37.0 1410.0 1250.0 146.0
有沒有熊貓的方法呢?我做了這樣的,但它是非常髒的,我相信有一個更好的辦法做到這一點(在文檔重採樣方法是缺乏的例子......):
def quarterlyMonthNmaes(x):
start_date = x.name - pd.offsets.MonthBegin(3)
final_date = str(start_date.strftime('%b')) + " - " + str(x.name.strftime('%b, %Y'))
return final_date
df["Total"].apply(quarterlyMonthNmaes, axis=1)