Help with lme4 model specification
Thanks! I made this correction
ONKELINX, Thierry wrote:
Please note that the case of characters is important in R. Hence "True" differs from "TRUE". You need to use REML = TRUE instead of REML = True! The only valid logical values are TRUE, FALSE, T and F. But I recommend to use only TRUE and FALSE. Because you can overwrite T and F. You could do something like T <- FALSE, which is ofcourse not a good idea. TRUE and FALSE can not be overwritten. HTH, Thierry ------------------------------------------------------------------------ ---- 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 Belgium tel. + 32 54/436 185 Thierry.Onkelinx at inbo.be www.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 data. ~ John Tukey -----Oorspronkelijk bericht----- Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Namens boeinguy2 Verzonden: donderdag 7 mei 2009 0:21 Aan: r-help at r-project.org Onderwerp: [R] Help with lme4 model specification I am new to R and am trying to specify a model for mixed model analysis. When I run the following model I get an error: AAT<- lmer(Y ~ S + A + (1|S:A/H), data=AT, REML=True) The error looks like this: Error in Spar_loc:`:` : NA/NaN argument In addition: Warning messages: 1: In model.matrix.default(mt, mf, contrasts) : variable 'Spar_loc' converted to a factor 2: In Spar_loc:`:` : numerical expression has 720 elements: only the first used I am having trouble specifying th random component. It should reflect the random term as H nested within the interaction of S & A. What am I doing wrong? :confused: -- View this message in context: http://www.nabble.com/Help-with-lme4-model-specification-tp23415908p2341 5908.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at 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. 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. ______________________________________________ R-help at 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.
View this message in context: http://www.nabble.com/Help-with-lme4-model-specification-tp23415908p23428528.html Sent from the R help mailing list archive at Nabble.com.