python - rpy2 支持毫秒时间戳和带时区的时间戳吗？

Question

我处理大量时间序列刻度数据，并尝试使用 rpy2将此数据从 Python 获取到 R。具体来说，我想传输包含毫秒时间戳(关键)和时区信息(最好有)的时间序列。

为了测试传输时间戳，我尝试了:

from pytz import timezone
from datetime import datetime
import rpy2.robjects as robjects

# 1 microsecond into 2015 in US Eastern time
time = datetime(2015,1,1,0,0,0,1, tzinfo = timezone('US/Eastern'))
robjects.r.assign('time', time)

但这给出了:

Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "C:\Python\2.7\lib\site-packages\rpy2\robjects\functions.py", line 170, in __call__
    return super(SignatureTranslatedFunction, self).__call__(*args, **kwargs)
  File "C:\Python\2.7\lib\site-packages\rpy2\robjects\functions.py", line 96, in __call__
    new_args = [conversion.py2ri(a) for a in args]
  File "C:\Python\2.7\lib\site-packages\singledispatch.py", line 210, in wrapper
    return dispatch(args[0].__class__)(*args, **kw)
  File "C:\Python\2.7\lib\site-packages\rpy2\robjects\conversion.py", line 39, in py2ri
    raise NotImplementedError("Conversion 'py2ri' not defined for objects of type '%s'" % str(type(obj)))
NotImplementedError: Conversion 'py2ri' not defined for objects of type '<type 'datetime.datetime'>'

似乎 rpy2 不支持 datetime 对象...那么如何将时间序列传输到 R 中？

Answer 1

R 中有多种日期/时间对象。

例如:

robjects.POSIXct([time])

了解后，您可以快速向 rpy2 添加转换规则