Re: [R] How to get predictions, plots, etc. from lmer{lme4}

From: Douglas Bates <bates_at_stat.wisc.edu>
Date: Sat 16 Apr 2005 - 23:16:34 EST

Michael Kubovy wrote:
> Kindly send a cc to me when replying to the list.
>
> I'm having trouble using lmer beyond a first step.
>
> My data:
> > some(exp1B)
> sub ba amplitude a b c d
> 2 1 1.00 1.5 65 63 4 8
> 41 4 1.15 0.0 92 41 3 4
> 43 4 1.15 3.0 88 48 2 2
> 63 6 1.00 3.0 50 72 9 9
> 77 8 1.15 0.0 112 25 2 1
> 89 10 1.15 0.0 37 33 36 34
> 126 13 1.15 1.5 80 50 6 4
> 140 14 1.15 4.5 12 115 6 7
> 145 20 1.00 0.0 73 65 0 2
> 147 20 1.00 3.0 63 72 2 3
> etc.
>
> The output:
> > summary(exp1B.both.cont.lmer)
> Linear mixed-effects model fit by maximum likelihood
> Formula: cbind(b, a) ~ ba + amplitude + (1 | sub)
> Data: exp1B
> AIC BIC logLik MLdeviance REMLdeviance
> 768.0086 783.2579 -379.0043 758.0086 766.3104
> Random effects:
> Groups Name Variance Std.Dev.
> sub (Intercept) 0.18787 0.43344
> Residual 6.36355 2.52261
> # of obs: 156, groups: sub, 13
>
> Fixed effects:
> Estimate Std. Error DF t value Pr(>|t|)
> (Intercept) 4.118806 0.397780 153 10.3545 < 2.2e-16
> ba -4.205518 0.330010 153 -12.7436 < 2.2e-16
> amplitude 0.137958 0.023754 153 5.8076 3.547e-08
>
> This is just what I need. But I also need predicted values, plots, etc,
> and can't figure out how to proceed. Have I overlooked a more extended
> document than the rather terse (for me at least) help page?

I regret to say no. Methods for generalized linear mixed models fit by lmer are still rather rudimentary.



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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Apr 16 23:20:32 2005

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