A note about xts:
The time class layer is abstracted from the implementation. This
allows for some very time specific manipulation without having to
manage the underlying details.
Take a look at the xts docs and vignette.
Also, the functions .indexmon .indexyear etc correspond to the POSIXlt
components. The xts object doesn't use this as a class, but this
allows you access as if it did.
HTH
Jeff
Jeffrey A. Ryan
jeffrey.r...@insightalgo.com
ia: insight algorithmics
www.insightalgo.com
On Jan 22, 2010, at 12:18 PM, "Brian G. Peterson"
<br...@braverock.com> wrote:
FMH wrote:
Dear All,
I have a series of data in which the first column consist of a
combination of date and time, for instance 17 April 2008 at 4.01pm,
such data is recorded as:
4/17/2008 16:01
I'd like to seperate it into four different columns which consist
of Day, Month,Year and Time, respectively.
Could someone please advice me on this mater?
Use xts.
Specify a POSIXlt index
All of the properties will be available in POSIXlt.
However, you didn't state what you wish to accomplish. It is likely
that xts will be able to subset anything you need without splitting
things up.
Realize that using a real time series class will always perform
better than using a data frame.
Cross-posting is considered rude. If you need more help than the
above, please make your query specific to some problem in finance,
to keep the list focused on its topic (finance), or only reply to r-
help.
It would be polite to sign your name too...
Regards,
- Brian
--
Brian G. Peterson
http://braverock.com/brian/
Ph: 773-459-4973
IM: bgpbraverock
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