错误如下:
Traceback (most recent call last): File "", line 1, in File "D:\Users\Administrator\Anaconda2\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 699, in runfile execfile(filename, namespace) File "D:\Users\Administrator\Anaconda2\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 74, in execfile exec(compile(scripttext, filename, 'exec'), glob, loc) File "C:/Users/Administrator/Documents/Python Scripts/untitled1.py", line 24, in s3=s2.resample('5min', how=ohlc_dict, closed='left', label='left') File "D:\Users\Administrator\Anaconda2\lib\site-packages\pandas\core\generic.py", line 4212, in resample base=base, key=on, level=level) File "D:\Users\Administrator\Anaconda2\lib\site-packages\pandas\tseries\resample.py", line 944, in resample return tg._get_resampler(obj, kind=kind) File "D:\Users\Administrator\Anaconda2\lib\site-packages\pandas\tseries\resample.py", line 1057, in _get_resampler "but got an instance of %r" % type(ax).__name__) TypeError: Only valid with DatetimeIndex, TimedeltaIndex or PeriodIndex, but got an instance of 'Index'
我的代码如下:
names = ['date', 'time', 'open', 'high', 'low', 'close', 'vol', 'amount'] s2=pd.read_csv('E:/test/SZ399920.csv',names=names, header=None, index_col='date') ohlc_dict = { 'open':'first', 'high':'max', 'low':'min', 'close': 'last', 'vol': 'sum' } s3=s2.resample('5min', how=ohlc_dict, closed='left', label='left')
dataframe文件的格式如下:
你应该先把Index变成DatetimeIndex。你想resample到5分钟的话你也要把time放Index里:
df = pd.DataFrame({'date': ["2008/07/01","2008/07/01","2008/07/01","2008/07/01","2008/07/01","2008/07/01","2008/07/01","2008/07/01"], 'time': ['09:31', '09:32','09:33','09:34','09:35','09:36','09:37', '09:38'], 'vals': [1, 2, 3, 4, 5, 6, 7, 8]}) df2 = df.set_index(pd.DatetimeIndex(pd.to_datetime(df.date + " " + df.time))) df2.resample("5min", how={'vals': 'mean'})