[R] Problem with pairs() in nlme

[dgmaccoon]

The age of this post makes me hope there is an easy response from someone.

When I do the following with Orthodont built-in dataset:

library(nlme)

OrthoFem<-Orthodont[Orthodont$Sex=="Female",]

fm1OrthF.lis<-lmList( distance ~ age,data = OrthoFem)


I get the same error: 

Error in function (classes, fdef, mtable)  : 
  unable to find an inherited method for function "lmList", for signature
"formula", "nfnGroupedData"


Since this is straight out of Pinheio & Bates book and the same thing
happens when I use the example posted with ?lmList, I have no idea what to
do.

Thank you.



Michael Kubovy wrote:
> 
> Dear r-helpers,
> 
> After successfully running
> require(nlme)
> vfr.lmL <- lmList(
>      estimate ~ (slant + respType + visField + hand)^2 | subject, vfr
>      )
> 
> pairs(vfr.lmL, id = 0.01, adj = -0.5) # Pinheiro & Bates (p. 141)  
> produces the following error:
> Error in sprintf(gettext(fmt, domain = domain), ...) :
> 	object "form" not found
> 
> Any guesses as to what I may have done wrong?
> 
> vfr is not a grouped object because:
> 
> vfrg <- groupedData(estimate ~ slant | subject, data = vfr)
> vfrg.lmL <- lmList(
> 	estimate ~ (slant + respType + visField + hand)^2 | subject,
> 	vfrg)
> Error in function (classes, fdef, mtable)  :
> 	unable to find an inherited method for function "lmList", for  
> signature "formula", "nfnGroupedData"
> 
> The data are at
> http://www.people.virginia.edu/~mk9y/LongFormat.csv
> 
> To get the working data.frame:
> vf <- read.table("http://www.people.virginia.edu/~mk9y/ 
> LongFormat.csv", header = TRUE, sep=',')
> names(vf) <- c(
>      'slant', 'estimate', 'respType', 'visField', 'hand',
>      'order', 'sex', 'subject', 'handPref'
> )
> require(reshape)
> vf <- sort_df(vf, vars = 'slant')
> vf$subject <- factor(vf$subject)
> summary(vf)
> vfr <- subset(vf, handPref == 'R', select = -handPref)
> vfr <- subset(vfr, slant %in% c(10, 20, 30))
> 
> _____________________________
> Professor Michael Kubovy
> University of Virginia
> Department of Psychology
> USPS:     P.O.Box 400400    Charlottesville, VA 22904-4400
> Parcels:    Room 102        Gilmer Hall
>          McCormick Road    Charlottesville, VA 22903
> Office:    B011    +1-434-982-4729
> Lab:        B019    +1-434-982-4751
> Fax:        +1-434-982-4766
> WWW:    http://www.people.virginia.edu/~mk9y/
> 
> ______________________________________________
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> PLEASE do read the posting guide
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> and provide commented, minimal, self-contained, reproducible code.
> 


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