[R-sig-ME] qqnorm question

[Chaudhari, Monica]

Hello Kyle,

Are you trying to test the normality of random effects? If yes, then
below is the way to go:
str(re<-ranef(modl,postVar = TRUE))
qqmath(re)
or qqmath(~re[[1]]); qqmath(~re[[2]]);

Hope this helps.

Thanks,
Monica


-----Original Message-----
From: r-sig-mixed-models-bounces at r-project.org
[mailto:r-sig-mixed-models-bounces at r-project.org] On Behalf Of Roberts,
J. Kyle
Sent: Friday, March 30, 2007 8:56 AM
To: r-sig-mixed-models at r-project.org
Subject: [R-sig-ME] qqnorm question

Dear All,
 
Forgive my lack of knowledge, but I can't get qqnorm to work with lmer.
I get the following error (dep.lmer is a lmer class object):
 
> qqnorm(dep.lmer)
Error in min(..., na.rm = na.rm) : invalid 'type' (list) of argument
In addition: Warning message:
is.na() applied to non-(list or vector) in: is.na(y)
 
Any ideas?
 
Kyle
 
***************************************
J. Kyle Roberts, Ph.D.
Baylor College of Medicine
Center for Educational Outreach
One Baylor Plaza, MS:  BCM411
Houston, TX   77030-3411
713-798-6672 - 713-798-8201 Fax
jkrobert at bcm.edu
***************************************
 

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