我正在对数据帧进行重采样,它可以在数小时,数分钟的时间内运行,但不会在不到sec的时间内重新采样。程序即使在很短的时间间隔内也会挂起。那我想念什么吗?
我尝试了0.000001S,U等。。。到目前为止没有任何效果。
我的时间格式:2015-08-29 19:30:47.015506
您可以看到变量sf代表重采样频率。
grph = df.set_index('Date and Time').resample(sf, len).astype(int)
如何以微秒粒度重新采样数据帧?
sf = "1U" #for one microsecond
使用毫秒/微秒/秒:
L milliseonds
U microseconds
S seconds
B business day frequency
C custom business day frequency (experimental)
D calendar day frequency
W weekly frequency
M month end frequency
BM business month end frequency
CBM custom business month end frequency
MS month start frequency
BMS business month start frequency
CBMS custom business month start frequency
Q quarter end frequency
BQ business quarter endfrequency
QS quarter start frequency
BQS business quarter start frequency
A year end frequency
BA business year end frequency
AS year start frequency
BAS business year start frequency
BH business hour frequency
H hourly frequency
T minutely frequency
S secondly frequency
L milliseonds
U microseconds
N nanoseconds
如果我正确理解了您的问题,就无法将微秒重新采样到另一个小于一秒的频率,对吗?我做了一个玩具示例,但是似乎没有问题:
import pandas as pd
import numpy as np
np.random.seed(0)
index=pd.date_range('22/10/2010', periods=100000, freq='U')
example=pd.Series(index=index,data=np.random.randn(100000))
example.resample('ms',how='sum')
这给出了预期的输出。
((我认为您的问题是,您尝试将微秒格式的数据重新采样为微秒本身,这没有任何意义。您想要上采样或下采样(如我的示例)。]