I am a little curious on your functional closures design plan. I know
calcualtions. R seems also kind of functional language. But what will be the
> In fact zoo doesn't work for me by default. I think the issue is that
> quantmod calls setOldClass for you (to use S3 as S4 slots).
>
> library(zoo)
> setClass("trader",representation(prices="zoo",indicator="zoo"))
>
> [1] "trader"
> Warning message:
> In .completeClassSlots(ClassDef, where) :
> undefined slot classes in definition of "trader": prices(class
> "zoo"), indicator(class "zoo")
>
>
> Keeping the environment as clean as possibly (don't attach other
> packages that can change the game) is the best way to find the issue.
>
> library(xts)
> setClass("trader",representation(prices="xts",indicator="xts"))
>
> [1] "trader"
> Warning message:
> In .completeClassSlots(ClassDef, where) :
> undefined slot classes in definition of "trader": prices(class
> "xts"), indicator(class "xts")
>
>
> # have to call setOldClass ... this really should be setS3Class IMO,
> as "Old" implies bad...
>
> setOldClass("xts")
> setClass("trader",representation(prices="xts",indicator="xts"))
> [1] "trader"
>
> getClass("trader")
> Class "trader" [in ".GlobalEnv"]
>
> Slots:
>
> Name: prices indicator
> Class: xts xts
>
> As may be evident from my previous work, I'd petition you not to use
> S4 classes until S5 comes out ;) quantmod is in the process of
> removing all S4 objects, instead migrating to more powerful (though
> slightly less OO style in some sense) functional closures. Yes
> _functional closures_...
>
> One other point, the newest xts_0.6-8 from CRAN should be used now, as
> there were some major improvements and bug fixes implemented in the
> release.
>
> Best,
> Jeff
>
> On Tue, Oct 27, 2009 at 5:22 AM, Wind <
[hidden email]> wrote:
> > I wonder how to use xts in setClass(). It seems that zoo is OK.
> > Thanks.
> >
> > Wind
> >
> >
> >> library(quantmod)
> > Loading required package: xts
> > Loading required package: zoo
> >
> > Attaching package: 'zoo'
> >
> >
> > The following object(s) are masked from package:base :
> >
> > as.Date.numeric
> >
> > xts now requires a valid TZ environment variable to be set
> > your current TZ:CST-8
> > Loading required package: Defaults
> > Loading required package: TTR
> >> setClass("trader",representation(prices="zoo",indicator="zoo"))
> > [1] "trader"
> >> setClass("trader",representation(prices="xts",indicator="xts"))
> > [1] "trader"
> > Warning message:
> > In .completeClassSlots(ClassDef, where) :
> > undefined slot classes in definition of "trader": prices(class "xts"),
> > indicator(class "xts")
> >
> >> sessionInfo()
> > R version 2.9.2 (2009-08-24)
> > i386-pc-mingw32
> >
> > locale:
> > LC_COLLATE=Chinese (Simplified)_People's Republic of
> > China.936;LC_CTYPE=Chinese (Simplified)_People's Republic of
> > China.936;LC_MONETARY=Chinese (Simplified)_People's Republic of
> > China.936;LC_NUMERIC=C;LC_TIME=English_United States.1252
> >
> > attached base packages:
> > [1] stats graphics grDevices utils datasets methods base
> >
> > other attached packages:
> > [1] quantmod_0.3-11 TTR_0.20-1 Defaults_1.1-1 xts_0.6-7
> > [5] zoo_1.5-8
> >
> > loaded via a namespace (and not attached):
> > [1] grid_2.9.2 lattice_0.17-25
> >>
> >
> > [[alternative HTML version deleted]]
> >
> > _______________________________________________
> >
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> >
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>
>
>
> --
> Jeffrey Ryan
>
[hidden email]
>
> ia: insight algorithmics
> www.insightalgo.com
>
