[R-sig-ME] GLMM linearity checking

[Ben Bolker]

fengsj at mail.utexas.edu wrote:
> I am sorry for asking this question here. It is more related to  
> logistic regression.
> 
> I need to use GLMM (binomial(link = "logit")) )to fit my data. The  
> dependent variable is 0 or 1 and  I'd like to do some roughly  
> graphical checkings for my data to see if the responses of  
> transformaed data are linear with respect to continuous predictors in  
> general. How should I do this?
> 
> Thanks,
> 

   how about

 m <- glmer(...,data=d)
 d$resid <- residuals(m)

 xyplot(resid~continuous_predictor_1,type=c("p","smooth"),data=d)

 ...

  Non-linearity on the transformed scale will appear as a (non-flat)
pattern of the (smoothed line fitted to the) residuals as a function of
the continuous predictors ...

  Ben Bolker