D'Oh -- just spotted it (don't know what was wrong with me):
in your code: "2011-01-05" and ts = zoo(x dt) need to be changed.
If you do that, the same trick
time(ts)[ts==3]
will work. Still, I'm a big xts fan.
Michael
On Tue, Aug 9, 2011 at 10:45 PM, R. Michael Weylandt <
michael.weyla...@gmail.com> wrote:
> I'd suggest you look into the xts class and write
>
> require(xts)
> xts = as.xts(1:5,Sys.Date()+1:5)
> time(xts)[xts==3]
>
> By the way, your code isn't pastable for me: not sure why.
>
> Michael Weylandt
>
>
> On Tue, Aug 9, 2011 at 10:39 PM, Richard Ma <xuanlong...@uts.edu.au>wrote:
>
>> Hi all,
>>
>> I have a zoo time series object, see below code:
>>
>> -------------------------------------------------------------------------------------------
>>
>> # This is a pasteable example
>> library(zoo)
>>
>> x <- c(1, 2, 3, 4, 5)
>> dt <- c("2011-01-01", "2011-01-02", "2011-01-03", "2011-01-04",
>> "201-01-05")
>> ts <- zoo(x, ts)
>>
>>
>> -------------------------------------------------------------------------------------------
>>
>> Now, I want to know the date when 'ts' equal to a specific value. In this
>> example, suppose I want to know when the ts = 3? The program should return
>> "2011-01-03".
>>
>> Is there a function to do this job conveniently?
>>
>> Regards,
>> Richard
>>
>> -----
>> Richard Ma
>> PhD student, Ecology & Remote Sensing
>> Climate Change Cluster, Department of Environment Science
>> University of Technology, Sydney
>> http://everydropr.wordpress.com
>> --
>> View this message in context:
>> http://r.789695.n4.nabble.com/How-to-get-the-date-of-specific-value-within-a-zoo-object-tp3731885p3731885.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
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>>
>
>
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