[R-SIG-Finance] Testing existence in xts

[Jeff Ryan]

Try:

> library(xts)
Loading required package: zoo
> x <- xts(1:3, Sys.Date()+1:3)
> x
           [,1]
2010-04-14    1
2010-04-15    2
2010-04-16    3
> x['2010-04-17']
Data:
integer(0)

Index:
integer(0)
> length(x['2010-04-17'])
[1] 0
> length(x['2010-04-16'])
[1] 1
>

HTH
Jeff

On Tue, Apr 13, 2010 at 4:23 PM, Worik Stanton <worik.stanton at gmail.com> wrote:
> How do I test for the existence of an entry in a xts?
>
> Given xts z
>> z
>              z
> 2009-01-08 1.71
> 2009-01-09 1.72
> 2009-01-12 1.71
>
> and I want to test if z["2009-01-10",] exists, how do I do it?
>
> cheers
> Worik
> --
> Dig it out of the ground
> Melt it down
> Bury it
> Guard it
>
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-- 
Jeffrey Ryan
jeffrey.ryan at insightalgo.com

ia: insight algorithmics
www.insightalgo.com