[R] How to plot fitted values from lmer (lme4 package)?

[jebyrnes]

The trick is to use the fitted() function, not predict(), to get your fitted
values.  You should then be able to use that vector of values in just the
same way that you use your current mean values as below.


Darren Norris wrote:
> 
> 
> lmodel<-with(a_dataframe,lm(mean_ind~sin(time*2*pi)+cos(time*2*pi)))
> plot(time,a_dataframe$mean_ind,pch=".")
> lines(time,predict(lmodel))
> 
> How can I do the same with lmer? I have tried a variety of things with
> “predict”, trying to put the results from lmer as a “groupedData” object
> etc. But I can’t seem to make it work. Any simple solutions? 
> Many thanks for any help.
> 
> 
> 

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