Thanks a lot!

Eryk

On 5/25/06, Sundar Dorai-Raj <sundar.dorai-raj@pdf.com> wrote:
>
>
>
> Witold Wolski wrote:
> > Hi,
> >
> > Don't have a clue what teh following error message
> >
> >
> > generated by this function call:
> > qqmath( ~val|ind,data = xx
> >        ,distribution = function(p){ qt(p,df=20)}
> >        ,ylab="Sample Quatinles"
> >        ,xlab="Theoretical Quantiles"
> >
> >        ,panel=function(x,y)
> >        {
> >          panel.qqmathline(y
> >                           , distribution=function(p) qt(p,df=20)
> >                           ,col=2)
> >          panel.qqmath(x, y
> >                       , distribution=function(p) qt(p,df=20)
> >                       ,pch=".",cex=2)
> >        }
> > )
> >
> > means. Espacially that this function call
> >
> > qqmath( ~val|ind,data = xx
> >        ,distribution = function(p){ qt(p,df=20)}
> >        ,ylab="Sample Quatinles"
> >        ,xlab="Theoretical Quantiles"
> > )
> >
> > with the same data is working.
> >
> > Thanks in advance for suggestions.
> >
> > Eryk
> >
>
> Hi, Eryk,
>
> The function panel.qqmath does not take an argument "y".
>
> Here's a complete example (which you should have supplied):
>
> library(lattice)
> set.seed(1)
> xx <- data.frame(ind = factor(rep(1:4, each = 100)))
> xx$val <- rt(400, 20)
> qt2 <- function(p) qt(p, df = 20)
> qqmath(~val | ind, data = xx,
>         distribution = qt2,
>         ylab = "Sample Quantiles",
>         xlab = "Theoretical Quantiles",
>         panel = function(x) {
>           panel.qqmathline(x, distribution = qt2, col = 2)
>           panel.qqmath(x, distribution = qt2, pch=".", cex = 2)
>         })
>
> --sundar
>
> P.S. Please (re-)read the posting guide. If you get an error in your
> script, tell us what it is. And provide an complete example (the posting
> guide gives guidelines here). Quite often I solve my own problem in the
> process of coming up with an example I'd like to post to R-help.
>

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