Dear all,

My question is how to get predictions and confidence intervals when using
lmer?

I have spend the whole previous day working with this whithout any success.
I have tried library(ggplot2), further I tried ezPredict in the "ez"
package, but I find it difficult to adapt my model to the provided scripts.
I assume that I'm on the right track, but needs help to write the right
script to achive predictions and confidence interval for my model.

I have the following model:

Speed = fixed effect (continous)
BodyMass = fixed effect (continous)
ID = random effect
Species = random effect.

lmerfit1<-(Speed~BodyMass+(1|ID)+(1|Species))

>From this I would like to make a regression curve with confidence
intervals, showing the effect of BodyMass on Speed.

Hope I could get some advice.

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