[R] package nlme

ONKELINX, Thierry Thierry.ONKELINX at inbo.be
Mon Oct 12 11:12:06 CEST 2009

You did not specify the random effects. Try something like

Rice.lme<-lme(Yield ~ Variety + Stand,data=Rice, random = ~1|Block)



ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature
and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics,
methodology and quality assurance
Gaverstraat 4
9500 Geraardsbergen
tel. + 32 54/436 185
Thierry.Onkelinx at inbo.be

To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to
say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of
~ John Tukey

-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
Namens wenjun zheng
Verzonden: maandag 12 oktober 2009 10:57
Aan: R-help at r-project.org
Onderwerp: [R] package nlme

Hi R Users,     When I use package nlme for linear model with random
effects, there exists errors and I don't know the data structure of lme.
     Here is my data:

    Rice.lme<-lme(Yield ~ Variety + Stand  + Block,data=Rice)

    And error will be like below:

    Wrong at getGroups.data.frame(dataMix, groups) :
    Invalid formula for groups

    can you give me some advice and you will be appreciated. Thanks.


	[[alternative HTML version deleted]]

R-help at r-project.org mailing list
PLEASE do read the posting guide
and provide commented, minimal, self-contained, reproducible code.

Druk dit bericht a.u.b. niet onnodig af.
Please do not print this message unnecessarily.

Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver weer 
en binden het INBO onder geen enkel beding, zolang dit bericht niet bevestigd is
door een geldig ondertekend document. The views expressed in  this message 
and any annex are purely those of the writer and may not be regarded as stating 
an official position of INBO, as long as the message is not confirmed by a duly 
signed document.

More information about the R-help mailing list