我有一个dataframe,myDF,我希望将其中的一列设置为0,使用其他列的条件组合,并使用第二个dataframe criteriaDF建立索引。在
在我的头():
DateTime GrossPowerMW USDateTime_string DateTime_timestamp \
0 01/01/1998 00:00 17.804 01/01/1998 00:00 1998-01-01 00:00:00
1 01/01/1998 01:00 18.751 01/01/1998 01:00 1998-01-01 01:00:00
2 01/01/1998 02:00 20.501 01/01/1998 02:00 1998-01-01 02:00:00
3 01/01/1998 03:00 22.222 01/01/1998 03:00 1998-01-01 03:00:00
4 01/01/1998 04:00 24.437 01/01/1998 04:00 1998-01-01 04:00:00
Month Day Hour GrossPowerMW_Shutdown
0 1 3 0 17.804
1 1 3 1 18.751
2 1 3 2 20.501
3 1 3 3 22.222
4 1 3 4 24.437
标准:
^{pr2}$然后,myDF通过以下for循环运行:
month = 1
for month in range (1, 13):
shutdown_hours = range(int(criteriaDF.iloc[month]['STARTTIME']), int(criteriaDF.iloc[month]['ENDTIME']))
myDF.loc[(myDF["Month"].isin([month])) & (myDF["Hour"].isin(shutdown_hours)) & (myDF["Day"].isin(shutdown_days)), "GrossPowerMW_Shutdown"] *= 0
month = month + 1
这将产生以下错误:
Traceback (most recent call last):
File "", line 1, in runfile('myscript.py', wdir='C:myscript')
File "C:\ProgramData\Anaconda2\lib\site-packages\spyder\utils\site\sitecustomize.py", line 880, in runfile execfile(filename, namespace)
File "C:\ProgramData\Anaconda2\lib\site-packages\spyder\utils\site\sitecustomize.py", line 87, in execfile exec(compile(scripttext, filename, 'exec'), glob, loc)
File "myscript.py", line 111, in gross_yield, curtailed_yield, shutdown_loss, df_testing = calculate_loss(input_file, input_shutdownbymonth, shutdown_days) #Returning df for testing/interrogation only. Delete once finished.
File "myscript.py", line 79, in calculate_loss shutdown_hours = range(int(criteriaDF.iloc[month]['STARTTIME']), int(criteriaDF.iloc[month]['ENDTIME']))
File "C:\ProgramData\Anaconda2\lib\site-packages\pandas\core\indexing.py", line 1328, in __getitem__ return self._getitem_axis(key, axis=0)
File "C:\ProgramData\Anaconda2\lib\site-packages\pandas\core\indexing.py", line 1749, in _getitem_axis self._is_valid_integer(key, axis)
File "C:\ProgramData\Anaconda2\lib\site-packages\pandas\core\indexing.py", line 1638, in _is_valid_integer raise IndexError("single positional indexer is out-of-bounds")
IndexError: single positional indexer is out-of-bounds
但是如果我设置
month = 0
for month in range (0, 12)
但是,这与我的dataframe在列['Month']上的索引不匹配,该列运行1-12而不是0->;11。在
为了证实我的理解
range (1, 13)
退货
[1,2,3,4,5,6,7,8,9,10,11,12].
我还尝试过用for循环中month=12的代码逐行手动运行代码。所以我不确定为什么在rage中使用month(1,13)不起作用,注意到12是列表范围(1,13)中的最高整数。在
我的代码或方法有什么错误?在
您使用的是^{} ,这是“基于位置的纯整数位置索引”,因此它只计算从0到11的行数
您应该使用^{} ,它可以查看索引的值(从1到12)
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