when combining a caterpillar graph in r a function that predicts an independent event is what is a caterpillar plot in r r standard error how to fit an r model what is dt.m in statistics r fit.vc what's difference between stata vs r difference between stata xtmixed and r how to find the standard error of random effect in r r fit vc model how to find the variance of a caterpillar plot in r what is the difference between r and stata what is r standard error what is the difference between r and stata r vs stata how to do random dta plots what model do we use for the caterpillar plot how to fit a caterpillar which of the following is the best r model that would allow us to fit a simple variance model? where does xtmixed r fit what is stata