1
標題可能有點所以這裏混亂是一個例子:過濾數據幀
來源:
id | timestamp
1 | 2015-12-02 00:00:00
1 | 2015-12-03 00:00:00 <--- latest for id 1
2 | 2015-12-02 00:00:00
2 | 2015-12-04 00:00:00
2 | 2015-12-06 00:00:00 <--- latest for id 2
要這樣:
id | timestamp
1 | 2015-12-03 00:00:00
2 | 2015-12-06 00:00:00
'df.groupby( 'ID')。尾部(1)'? – jezrael