[R-sig-ME] question about predict using lme4

[Lionel]

Dear Xiaoma Li,

To answer your questions:

- No parameters are missed (why should they?)

- If you have in your lsttest2 data frame new levels for the random 
factors, new random deviates will be generated for these levels from a 
normal distribution with mean 0 and standard deviation equal to the 
estimated random standard deviation (to get these estimated values look 
at the summary output).

Hope this helps.

Yours,
Lionel

On 05/05/2016 15:46, Li, Xiaoma [GE AT] wrote:
> Hi all,
> I want to use lme4 to predict air temperature using land surface temperature.
> I now can ran the package successfully. But I am not familiar to the parameters of the predict function. Here is my code: plsttest=predict(mod.xm,lsttest2,allow.new.levels = T)
> I have two questions: Is there some parameters missed?
> How does lme4 predict new levels (new climate station in my study?) Does it use fixed model or others?
>
> Thank you very much!
>
> Sincerely
> Xiaoma li
>
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