我正在尝试在给定的开始时间重新采样数据
my program:
sales = [{'Timestamp': '2018-06-22 15:15:00', 'Jan': 150, 'Feb': 200, 'Mar': 140},
{'Timestamp': '2018-06-22 15:44:00', 'Jan': 250, 'Feb': 250, 'Mar': 250},
{'Timestamp': '2018-06-22 15:46:00', 'Jan': 200, 'Feb': 210, 'Mar': 215},
{'Timestamp': '2018-06-22 16:16:00', 'Jan': 200, 'Feb': 210, 'Mar': 215},
{'Timestamp': '2018-06-22 16:18:00', 'Jan': 200, 'Feb': 210, 'Mar': 215},
{'Timestamp': '2018-06-22 16:20:00', 'Jan': 50, 'Feb': 90, 'Mar': 95 }]
df = pd.DataFrame(sales)
df['Timestamp'] = pd.to_datetime(df['Timestamp'])
df = df.set_index('Timestamp')
ResampledDF = pd.DataFrame()
ResampledDF['J'] = df.Jan.resample("30T").max()
ResampledDF['F'] = df.Feb.resample("30T").max()
ResampledDF['M'] = df.Mar.resample("30T").max()
print(ResampledDF)
输出:
J F M
Timestamp
2018-06-22 15:00:00 150 200 140
2018-06-22 15:30:00 250 250 250
2018-06-22 16:00:00 200 210 215
这里输出从15:00:00开始自动采样数据,而我希望第一行在15:15:00,第二行在15:45:00等,如下所示
必需的输出:
J F M
Timestamp
2018-06-22 15:15:00 250 250 250
2018-06-22 15:45:00 200 210 215
2018-06-22 16:15:00 200 210 215
答案 0 :(得分:4)
In [233]: df.resample('30T', base=15).max()
Out[233]:
Feb Jan Mar
Timestamp
2018-06-22 15:15:00 250 250 250
2018-06-22 15:45:00 210 200 215
2018-06-22 16:15:00 210 200 215