what is corar1 vs var exp r what is cor ar in r what is the function corar which function is used to correct corar1 which function is used for multilevel model which r method is best to use corar1 and varExp together? corar1 error why is the weights parameter in nlme different corar in r mutilevel model what is the error when using corar in multilevel model how to use var exp and corar error in recalc.corar1 corar function what is the function of corar in r how to use corar1 in r what does corar mean in r r error when using corar function what is the error when using corar and var exp when using corar in nlme in r, I get which function corrects autocorrelation in multilevel model