[R] Problem with zoo and BootPR packages

[Achim Zeileis]

On Thu, 19 Nov 2009, Ricardo Gonçalves Silva wrote:

> Hi,
>
> I'm trying to plot the forecasts I generated using the Plot.Fore function of the BootPR package.
> But I got an error from zoo:
>
> My data:
>
> Time Series:
> Start = 1
> End = 18
> Frequency = 1
> [1]  38731  38628  39117  92809  71984  31226  58613  72360 107956  92066
> [11]  95208  99098  95848 120383 110717 105680  98469 101916
>
> Script:
>
> y1<-ts(y1);
> forey1<-BootBC(y1,p=2,h=3,nboot=5000,type="const+trend",correct="ssf")
> Plot.Fore(y1,forey1$forecast,start=1966,end=1984,frequency=1)
>
> The Error:
>
> Error in zooreg(x, start, end, frequency) :
>  "data" : attempt to define illegal zoo object
>
> Any Help?

This is a bug in Plot.Fore() which does not use the zoo functions 
correctly. It should be reported to the package maintainer.

To avoid it, you can do
   Plot.Fore(as.vector(y1), ...)
instead of
   Plot.Fore(y1, ...)

Note to the maintainer (Jae Kim, Cc now): Plot.Fore() calls zooreg(x) 
where x is a "ts" object. This isn't the appropriate use of zooreg() which 
expects a numeric vector/matrix (or a factor). In the case above 
as.zoo(y1) would already be enough (and preserve all time information). Or 
you can manually call zooreg(coredata(y1), start = ..., end = ..., ....). 
See the zoo vignettes/examples for more details.

Best,
Z

> Thanks
>
> Rick
> 	[[alternative HTML version deleted]]
>
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