search for: transfertypecat

...hnicity+ELL+ avgTransfers+sdTransfers+agec+Disability+ELL*pctELL+Disability*pctDisability+ pctMale+factor(yr>=2008)*factor(Grade), random=~Schoolid+Teacherid+Studentid, family="categorical", data=data[data$Grade>=4,]) Error in MCMCglmm(FCATprofLevel ~ transferTypeCat + factor(yr >= 2008) + : please use idh(trait):units, us(trait):units or trait:units for error structures involving catgeorical data with more than 2 categories Does anyone know how I can fix it? Thanks -- View this message in context: http://r.789695.n4.nabble.com/How-to-write-random-effe...