Try this:

x[index(x) == as.Date("2008-12-14")] <- 1

x


On Wed, Dec 17, 2008 at 2:24 PM, <tolga.i.uzuner@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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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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