[R] multiple variance structure in lmer giving zero variances

Hi all, I’m hoping someone might be able to help me out. Forgive me if my mistake is something simple. I am new to mixed models, new to R, and new to lme4 and am struggling to figure everything out. I have two questions that I am hoping someone can answer. 1) Am I using the correct random struc

[R] Plot error in package lme4

Hi, I am new to R and not fantastic at statistics so it may well be that I am doing something silly but I can't figure out what it is and hoping that somebody can help. I am running package lme4, and trying to get a Residuals vs. Fitted graph. When I try to plot, I receive an error. Error in as