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當我對某些數據進行重新採樣時,我有一個熊貓丟掉第一行的問題。請看下面的例子。請注意,如果將前一個時間戳前移1秒,則按預期工作。重新採樣後丟失第一行
我使用熊貓0.10.1
import pandas as pd
from datetime import datetime
from StringIO import StringIO
f = StringIO('''\
time,value
2011-06-03 00:00:05,0
2011-06-03 00:01:05,1
2011-06-03 00:02:05,2
''')
series = pd.read_csv(f, parse_dates=True, index_col=0)['value']
print series
# time
# 2011-06-03 00:00:05 0
# 2011-06-03 00:01:05 1
# 2011-06-03 00:02:05 2
# Name: value
# Problem resampling: 1st sample is missing
print series.resample('s')
# time
# 2011-06-03 00:00:06 NaN
# 2011-06-03 00:00:07 NaN
# 2011-06-03 00:00:08 NaN
# 2011-06-03 00:00:09 NaN
# ...
# 2011-06-03 00:01:52 NaN
# 2011-06-03 00:02:03 NaN
# 2011-06-03 00:02:04 NaN
# 2011-06-03 00:02:05 2
# 2011-06-03 00:02:06 NaN
# Freq: S, Name: value, Length: 121
當我運行此代碼時,輸出的第一行是「2011-06-03 00:00:05 0」,即第一個樣本不是失蹤。也許這是熊貓早期版本的問題(儘管我沒有聽說過)。你能告訴我們這個版本嗎? ''pd .__ version__''' –
謝謝@DanAllan,我使用的是0.10.1,看起來像是在0.12中修復的。 – user1802187