*Dear All,* * * *I got a very simple for you. Please help me to come up with the R code in nlme for the following SAS code:* * * *{* proc mixed data=spatvar; model yield = ; repeated / subject = intercept type = sp(sph)(row col); parms (0 to 10 by 2.5) (1 to 10 by 3 ); run; Note: The INTERCEPT specification creates an effect that is constant across the observations in the data set. This implies that all observations belong to the same subject. *}* * * *I'm struggling how to use groupedData function from nlme to come up with the right R code. Any suggestion and help will be highly appreciated. Thanks * * * *Regards!* * * *Yours Sincerely,* * * -- * Muhammad Yaseen * [[alternative HTML version deleted]]