我想選擇的數據集的右部爲具有以下示例說明:分割由time列的數據幀 - 大熊貓
輸入DF:
id_B, ts_B,value
id1,2017-04-27 01:35:30,0
id1,2017-04-27 01:35:40,0
id1,2017-04-27 01:35:50,1
id1,2017-04-27 01:36:00,4
id1,2017-04-27 01:36:10,5
id1,2017-04-27 01:36:20,100
id1,2017-04-27 01:36:30,155
id1,2017-04-27 01:36:40,235
id1,2017-04-27 01:36:50,0
id1,2017-04-27 01:36:60,0
id1,2017-04-27 01:37:00,2353
id1,2017-04-27 01:37:10,221
id1,2017-04-27 01:37:20,2432
id1,2017-04-27 01:37:30,2654
id1,2017-04-27 01:37:40,12
id1,2017-04-27 01:37:50,5
id1,2017-04-27 01:38:00,5
id1,2017-04-27 01:38:10,23
id1,2017-04-27 01:38:20,5
id1,2017-04-27 01:38:30,2
id1,2017-04-27 01:38:40,2
id1,2017-04-27 01:38:50,1
id1,2017-04-27 01:39:00,0
id1,2017-04-27 01:39:10,0
id1,2017-04-27 01:39:20,0
id1,2017-04-27 01:39:30,0
id1,2017-04-27 01:39:40,0
id1,2017-04-27 01:39:50,0
id1,2017-04-27 01:40:00,0
id1,2017-04-27 01:40:10,1
id1,2017-04-27 01:40:20,5
id1,2017-04-27 01:40:30,221
id1,2017-04-27 01:40:40,2432
id1,2017-04-27 01:40:50,2654
id1,2017-04-27 01:40:60,12
id1,2017-04-27 01:41:00,5
id1,2017-04-27 01:41:10,5
id1,2017-04-27 01:41:20,23
id1,2017-04-27 01:41:30,5
id1,2017-04-27 01:41:40,2
id1,2017-04-27 01:41:50,1
考慮以下內容: segment_number = 1
持續時間= 3分鐘
我想選擇從第一個df.value非零開始的數據框的第一個段,直到覆蓋3分鐘持續時間的最後一個值。
輸出: id1,2017-04-27 01:35:50,1 id1,2017-04-27 01:36:00,4 id1,2017-04-27 01:36:10,5 id1,2017-04-27 01:36:20,100 id1,2017-04-27 01:36:30,155 id1,2017-04-27 01:36:40,235 id1,2017-04-27 01:36:50,0 id1,2017-04-27 01:36:60,0 id1,2017-04-27 01:37:00,2353 id1,2017-04-27 01:37:10,221 id1,2017-04-27 01:37:20,2432 id1,2017-04-27 01:37:30,2654 id1,2017-04-27 01:37:40,12 id1,2017-04-27 01:37:50,5 id1,2017-04-27 01:38:00,5 id1,2017-04-27 01:38:10,23 id1,2017-04-27 01:38:20,5 id1,2017-04-27 01:38:30,2 id1,2017-04-27 01:38:40,2 id1,2017-04-27 01:38:50,1
考慮以下內容: segment_number = 2
持續時間= 1.40分鐘再予
我想選擇的dateframe從第一df.value非零開始直到所述第二區段最後的值覆蓋了1.40分鐘的持續時間。
輸出:
id1,2017-04-27 01:40:10,1
id1,2017-04-27 01:40:20,5
id1,2017-04-27 01:40:30,221
id1,2017-04-27 01:40:40,2432
id1,2017-04-27 01:40:50,2654
id1,2017-04-27 01:40:60,12
id1,2017-04-27 01:41:00,5
id1,2017-04-27 01:41:10,5
id1,2017-04-27 01:41:20,23
id1,2017-04-27 01:41:30,5
id1,2017-04-27 01:41:40,2
id1,2017-04-27 01:41:50,1
到目前爲止,我沒有索引DF WRT到ts_B使用`pd.to_datetime和set_index」,並使用一個變量‘last_end_point’,保持了前一段的指數跟蹤。
但我沒有得到正確的輸出。
任何幫助,將不勝感激。
那麼,你想拆你的'由遞減的時間間隔df'? –
是的,有點。更具體地說,我想按持續時間和起點分開它,第一次是從頭開始,第二次是前一次的最後一行的索引。 –
對不起,上一個分段的最後一個原始值+1。但它應該避免用df.value = 0開始段,並始終選擇不爲零的第一個段。 –