If you include the date, or use fractional seconds to create an interval, it
should work.
xts uses half open/half closed intervals so ["T09:30:00/T09:30:00"] is empty.
> (nobj <- xts(1:5, as.POSIXct('2014-12-15 09:30')+(-2):2))
[,1]
2014-12-15 09:29:58 1
2014-12-15 09:29:59 2
2014-12-15 09:30:00 3
2014-12-15 09:30:01 4
2014-12-15 09:30:02 5
> nobj["2014-12-15 09:30:00"]
[,1]
2014-12-15 09:30:00 3
> nobj["T09:29:59.5/T09:30:00.5"]
[,1]
2014-12-15 09:30:00 3
HTH,
-- David
-----Original Message-----
From: R-SIG-Finance [mailto:r-sig-finance-boun...@r-project.org] On Behalf Of
Robert Schien
Sent: Monday, December 15, 2014 8:32 AM
To: r-sig-finance@r-project.org
Subject: [R-SIG-Finance] selecting specific rows from an xts object
Hello,
I have a questions concerning the xts package.
How can I select rows for specific times from a xts series?
I know tthat one select a range with the help of "T", for example
x["T09:30:00/T09:40:00"]
But how can I select only the rows an 09:30:00 ?
x["T09:30:00/T09:30:00"] does not work. This delivers the
whole time series.
x["T09:30:00"] does not work, too. It delivers no rows at all.
So, how can I do, what I want?
I didn't find anything in the xts documentation.
Thank you in advance.
Greetings
Robert
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