pandas 下采样和上采样

2024-04-12 14:50:03 452

示例

import pandas as pd import numpy as np np.random.seed(0) rng = pd.date_range('2015-02-24', periods=10, freq='T') df = pd.DataFrame({'Val' : np.random.randn(len(rng))}, index=rng) print (df) Val 2015-02-24 00:00:00 1.764052 2015-02-24 00:01:00 0.400157 2015-02-24 00:02:00 0.978738 2015-02-24 00:03:00 2.240893 2015-02-24 00:04:00 1.867558 2015-02-24 00:05:00 -0.977278 2015-02-24 00:06:00 0.950088 2015-02-24 00:07:00 -0.151357 2015-02-24 00:08:00 -0.103219 2015-02-24 00:09:00 0.410599

#downsampling with aggregating sum print (df.resample('5Min').sum()) Val 2015-02-24 00:00:00 7.251399 2015-02-24 00:05:00 0.128833 #5Min is same as 5T print (df.resample('5T').sum()) Val 2015-02-24 00:00:00 7.251399 2015-02-24 00:05:00 0.128833 #upsampling and fill NaN values method forward filling print (df.resample('30S').ffill()) Val 2015-02-24 00:00:00 1.764052 2015-02-24 00:00:30 1.764052 2015-02-24 00:01:00 0.400157 2015-02-24 00:01:30 0.400157 2015-02-24 00:02:00 0.978738 2015-02-24 00:02:30 0.978738 2015-02-24 00:03:00 2.240893 2015-02-24 00:03:30 2.240893 2015-02-24 00:04:00 1.867558 2015-02-24 00:04:30 1.867558 2015-02-24 00:05:00 -0.977278 2015-02-24 00:05:30 -0.977278 2015-02-24 00:06:00 0.950088 2015-02-24 00:06:30 0.950088 2015-02-24 00:07:00 -0.151357 2015-02-24 00:07:30 -0.151357 2015-02-24 00:08:00 -0.103219 2015-02-24 00:08:30 -0.103219 2015-02-24 00:09:00 0.410599

pandas 下采样和上采样

示例

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