what is lme4 and glmer r does ps represent a fixed feature why does sas r use the different random slopes which r model gives the best random slope why i can't find a random slope in r where does ps and th come from why does sas program lmx have different random slopes why does sas use glmer what is sas glmer used for where does a binomial r model come from what is sas glmer? which variable is used to select the habitat type? how to find sas random slopes what is the difference between lme4 and glmer? how to find the ap glmer what is ps rs how is ps used in r what is r's random selection coefficients why does lme4 give me different random slope what is the lme4