python-2.7 - Python 数据帧在微秒内重新采样

Question

我正在使用重采样数据框，它可以在几小时、几天、几分钟内工作，但不会在几秒内重新采样。即使在很短的时间内，程序也会挂起。所以我错过了什么吗？

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

你可以看到变量 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？

Answer 1

sf = "1U" #for one microsecond

对于毫秒/微秒/秒，请使用:

L       milliseonds
U       microseconds
S       seconds

Full doc :

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