Re: [R] tweedie and lmer

This is the link that gave me the indication: https://stat.ethz.ch/pipermail/r-help/2007-March/127261.html Are there alternative ways to deal with a high count of zeros for count data with lmer? __ R-help@r-project.org mailing list https://stat.eth

[R] tweedie and lmer

following model: lmer(SUS ~ 1 + (1| GRP),REML=FALSE,data=mydata,family=tweedie(var.power=1.55,link.power=0)) I get the following error: Error in famType(glmFit$family) : unknown GLM family: ‘Tweedie’ If it helps, im on a mac with R V 2.9.1, lme4 V.0.999375-31, Tweedie V2.0. Thanks, Mohammad