what is the matrix in lmer can lmer create a multiple of an identity matrix what type of data does an lmer model use? what is the lmer matrix used for what is the coefficient of lmer what is the value of the matrix in lmer which package allows lmer to specify the number of observations for each sample of linear mixed model lmer definition physics what is the covariance of lmer when to use lmer what is lmer? how to set lmer to multiple observations does lmer allow multiple observations does lmer include multiple observations how many columns do you need for a group on a matrix what is the matrix of a lmer? how many columns does the matrix lmer have lmer how many columns of data in equation how do i set lmer what is the covariance structure of lmer?