My post was based on the definitions in yours so x had already been defined as a zoo object, x <- zoo(rnorm(500,0,1)).
On Mon, Jan 18, 2010 at 1:17 AM, Saji Ren <saji....@gmail.com> wrote: > > sorry for bothering you again, > the problem solved. the command should be : > > uprange=rollapply(zoo(x),width=10,FUN=function(x)quantile(x,0.8),align='right') > > > Gabor Grothendieck wrote: >> >> There is no quantile method defined for zoo objects so it falls >> through to the default method but that method does not work for zoo >> objects. Try this: >> >> set.seed(123) >> rn <- rnorm(500) >> quantile(rn, 0.8) >> quantile(coredata(zoo(rn)), 0.8) >> >> In the second question the error message tells you what the problem >> is. FUN is supposed to be a function but a vector of numbers has been >> supplied rather than a function. Try: >> >> uprange=rollapply(x,width=10,FUN=function(x)quantile(x,0.8),align='right') >> >> On Sat, Jan 16, 2010 at 10:08 PM, Saji Ren <saji....@gmail.com> wrote: >>> >>> Guys: >>> >>> 1).When I using the 'quantile' function, I get really confused. Here is >>> what >>> I met: >>> >>>> x<-zoo(rnorm(500,0,1)) >>>> quantile(x,0.8) >>> 400 >>> 1.060258 >>> >>>> c=rnorm(500,0,1) >>>> quantile(c,0.8) >>> 80% >>> 0.9986075 >>> >>> why do the results display different? Is that because of the different >>> type >>> of the class? >>> >>> 2).And I want to use the 'rollapply' function to compute a rolling >>> estimation of the sample quantile. >>> the command i used is below: >>> >>>> uprange=rollapply(x,width=10,FUN=quantile(x,0.8),align='right') >>> Here the 'x' is the one generated above in 1). >>> And the R told me: >>> >>> "mistakes in match.fun(FUN) : >>> 'quantile(x, 0.8)' is not a function, character or symbol" >>> >>> Can anyone help? Thank you in advanced. >>> >>> >>> ----- >>> ------------------------------------------------------------------ >>> Saji Ren >>> from Shanghai China >>> GoldenHeart Investment Group >>> ------------------------------------------------------------------ >>> -- >>> View this message in context: >>> http://n4.nabble.com/Confusion-in-quantile-and-getting-rolling-estimation-of-sample-quantiles-tp1015893p1015893.html >>> Sent from the R help mailing list archive at Nabble.com. >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> >> > > > ----- > ------------------------------------------------------------------ > Saji Ren > from Shanghai China > GoldenHeart Investment Group > ------------------------------------------------------------------ > -- > View this message in context: > http://n4.nabble.com/Confusion-in-quantile-and-getting-rolling-estimation-of-sample-quantiles-tp1015893p1016401.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
