Hello, I have one question about Anova in car package. Here is my situation: I have a response matrix (Y), consisting of 7 different responses for a group of subjects, 2 categorical factors (A, B), 3 covariates (C,D,E). I would like to know the main effects of 2 factors and the interaction between them on each of 7 responses. So, I used Linear regression (lm) and Anova with a model, Y[,i]~A+B+A:B+C+D+E in a loop. This worked as I expected it to work. However, I want to know how to perform the same task without using any loop to increase the performance. Basically, my question is How to perform multiples of LM and Anova without using a loop. If anyone know how to do this, would you advise me? Thank you in advance for your any help. -- Sungeun Kim [[alternative HTML version deleted]]