[R] replacing elements of a zoo object

[Gabor Grothendieck]

I didn't notice the second question and was only
answering your first question:

> library(zoo)
> x <- zoo(c(361.667, 389.875, NA, NA, 397.822, 395.667), as.Date("2008-12-11") + 0:5)
> x[as.Date("2008-12-14")]
2008-12-14
        NA

For the second question use window (window also works for the first question
as well):

> window(x, as.Date("2008-12-14")) <- 1
> x
2008-12-11 2008-12-12 2008-12-13 2008-12-14 2008-12-15 2008-12-16
   361.667    389.875         NA      1.000    397.822    395.667

See ?window.zoo

On Thu, Dec 18, 2008 at 8:31 AM,  <tolga.i.uzuner at jpmorgan.com> wrote:
>
> Thanks Gabor.
>
> Just tried that... it didn't work for some reason, even though it also did
> not complain about an error this time.
>
>
>> x[as.Date("2008-12-14")]
> 2008-12-14
>         NA
>> x[as.Date("2008-12-14")]<-1
>> x[as.Date("2008-12-14")]
> 2008-12-14
>         NA
>>
>
> Regards,
> Tolga
>
>
>
> Tolga Uzuner
> Cross-Markets
> Chief Investments Office
> JP Morgan
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>
> "Gabor Grothendieck" <ggrothendieck at gmail.com>
>
> 18/12/2008 04:07
>
> To
> tolga.i.uzuner at jpmorgan.com
> cc
> r-help at r-project.org
> Subject
> Re: [R] replacing elements of a zoo object
>
>
>
>
> Remove the comma in the line with the error.
>
> On Wed, Dec 17, 2008 at 11:24 AM,  <tolga.i.uzuner at jpmorgan.com> wrote:
>> Dear R Users,
>>
>> I am trying to do something quite simple: replace the elements of a zoo
>> object. For some reason, the following code does not seem to work. How can
>> I replace the value for the 14th of Dec of 2008 in the zoo object x below
>> with 1 (it is currently NA).
>>
>>> x
>> 2008-12-11 2008-12-12 2008-12-13 2008-12-14 2008-12-15 2008-12-16
>>   361.667    389.875         NA         NA    397.822    395.667
>>> class(x)
>> [1] "zoo"
>>> class(index(x))
>> [1] "Date"
>>> x[as.Date("2008-12-14"),]
>> 2008-12-14
>>        NA
>>> x[as.Date("2008-12-14"),]<-1
>> Error in x[as.Date("2008-12-14"), ] <- 1 :
>>  incorrect number of subscripts on matrix
>>>
>>
>>
>> Thanks in advance,
>> Tolga
>>
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> ________________________________
>
> Generally, this communication is for informational purposes only and it is
> not intended as an offer or solicitation for the purchase or sale of any
> financial instrument or as an official confirmation of any transaction. In
> the event you are receiving the offering materials attached below related to
> your interest in hedge funds or private equity, this communication may be
> intended as an offer or solicitation for the purchase or sale of such
> fund(s). All market prices, data and other information are not warranted as
> to completeness or accuracy and are subject to change without notice. Any
> comments or statements made herein do not necessarily reflect those of
> JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may
> contain information that is privileged, confidential, legally privileged,
> and/or exempt from disclosure under applicable law. If you are not the
> intended recipient, you are hereby notified that any disclosure, copying,
> distribution, or use of the information contained herein (including any
> reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any
> attachments are believed to be free of any virus or other defect that might
> affect any computer system into which it is received and opened, it is the
> responsibility of the recipient to ensure that it is virus free and no
> responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and
> affiliates, as applicable, for any loss or damage arising in any way from
> its use. If you received this transmission in error, please immediately
> contact the sender and destroy the material in its entirety, whether in
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