7
这里发生了什么? 我需要生成一个数据框与月初日期,,(1-1-2014至12-1-2014)fwiw我在其他地方使用fcast_year变量,在那里我需要月底,因此做日期数学熊猫生成月初范围
from pandas.tseries.offsets import *
fcast_yr=pd.to_datetime('2014-12-31')
x=(fcast_yr + pd.DateOffset(days= -30)) # to set x to 2014-12-01
d=pd.date_range((x +pd.DateOffset(months=-10)), periods=12, freq='MS') #"MS" means start of month!!
print d.values
给出这些月底价值....哎呀!
['2014-01-31T18:00:00.000000000-0600' '2014-02-28T18:00:00.000000000-0600'
'2014-03-31T19:00:00.000000000-0500' '2014-04-30T19:00:00.000000000-0500'
'2014-05-31T19:00:00.000000000-0500' '2014-06-30T19:00:00.000000000-0500'
'2014-07-31T19:00:00.000000000-0500' '2014-08-31T19:00:00.000000000-0500'
'2014-09-30T19:00:00.000000000-0500' '2014-10-31T19:00:00.000000000-0500'
'2014-11-30T18:00:00.000000000-0600' '2014-12-31T18:00:00.000000000-0600']
使用13.0 PF熊猫
mmm ..它的工作原理..我需要使用-12几个月..奇怪的...我想我还在与别的东西打架:-)谢谢! – dartdog
什么是时间戳? – robertevansanders
http://pandas.pydata.org/pandas-docs/dev/timeseries.html#time-stamps-vs-time-spans;熊猫的日期时间子类 – Jeff