Re: [R-sig-eco] Fixing heteroscedasticity in mixed-effects model?

2012-03-29 Thread Ben Bolker
Malin Pinsky malin.pinsky@... writes: I'm having problems fitting a mixed-effects model for an ecological meta-analysis, and I'm curious if anyone has advice. In particular, it's pretty clear that the variance in the residuals increases with the predicted mean, but my normal fixes don't seem

[R-sig-eco] Fixing heteroscedasticity in mixed-effects model?

2012-03-23 Thread Malin Pinsky
Hi all, I'm having problems fitting a mixed-effects model for an ecological meta-analysis, and I'm curious if anyone has advice. In particular, it's pretty clear that the variance in the residuals increases with the predicted mean, but my normal fixes don't seem to be working. The model is: mod1