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

[Michael Kubovy]

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?
_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
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