的Python使用大熊貓按天數來獲得數據的累積和
我已經得到了從Wunderground122天不具有相等的時間採樣間隔的天氣數據。以下是我的數據示例:
Bangor Weather Data from Wunderground
Datetime,Temp(F),Precip(in.),Snow (in.),PET(in./day),Baro(mBar)
2015-12-02 01:30:00,1.1,0.3,0.0,0.45524647117649564,1017.5
2015-12-02 01:53:00,1.1,0.3,0.0,0.45524647117649564,1017.6
2015-12-02 02:20:00,1.1,0.3,0.0,0.45524647117649564,1017.2
2015-12-02 02:53:00,1.7,0.5,0.0,0.500024812603692,1016.7
2015-12-02 02:55:00,1.7,0.3,0.0,0.500024812603692,1016.5
2015-12-02 03:09:00,1.1,0.3,0.0,0.45524647117649564,1016.1
2015-12-02 03:33:00,1.1,0.5,0.0,0.45524647117649564,1016.1
2015-12-02 03:53:00,1.7,0.8,0.0,0.500024812603692,1016.1
2015-12-02 04:34:00,1.7,0.5,0.0,0.500024812603692,1015.1
2015-12-02 04:46:00,1.7,0.5,0.0,0.500024812603692,1015.1
2015-12-02 04:53:00,1.7,0.8,0.0,0.500024812603692,1015.1
2015-12-02 05:13:00,1.7,0.0,0.0,0.500024812603692,1014.4
我想要獲取整個數據集的每日總積雪(重置爲零)。我想我的輸出看起來像:
2015-12-01,0.0
2015-12-02,0.0
2015-12-03,1.0
2015-12-04,3.0
2015-12-05,0.0
2015-12-06,1.0
我該如何使用熊貓來做到這一點?
[相關問題](https://stackoverflow.com/questions/14673394/python-pandas-extract-unique-dates-from-time-series)關於從時間序列中提取獨特日期。我懷疑你可以''分組''日期',然後申請'cumsum'。 – Paul
實際上,這有點不清楚 - 你是否希望累積金額在每一天都「重置」爲0,或者你想每天有1個數據點,那天的數值對應於雪的總數積累到那一點?我認爲在這裏展示一個示例輸出會有所幫助。 – Paul
是的,抱歉,缺乏清晰度。我想要特定日子的積雪。所以是的,當有新的一天時,它會重置爲零。 – Strak