what is the function of fitting in r what is the r function optim which of the following is the best fit function to fit the bivariate model? r fitting sigma what is a sigma in r what is the function of fitting of figma in sas? which r model does sigma depend on r fitting a model in r what is the name for the function that fitting a bivariate normal in r? which function can fit a bivariate normal to an observation r how to fit a bivariate normal how to do bivariate normal fitting which of the following is a fast fitting model in r what model do we find in r what is the function that fit for sigma what is fitting in r what function is used to fit a bivariate normal can you do a bivariate normal fit r how to fit a bivariate model what is the function of optim in r