how to fit model in r in sql how do i fit two variables for a r model? how to fit a model in r what is the difference between r and sas models what kind of variables can r fit r can be fitted with gls function and sas can i fit both the mean and log variance as a linear combination in r can a r model be used in sas to fit two variables which r function fits the y value nlpm how to fit the r model r model gls function can you model a r model in sas can you fit multiple models in sas r model in sas what is the difference between r and sas do all variables in an r model have to be additive how to fit a log in r what is the r model i need to fit? what functions fit sas in r sas how to fit two variables