Hi to anyone that can help I have complex weighted survey data and I find that the data best fit a sigmoid curve, like a dose response curve. I am using the complexity of a doctor visit to predict the time that docs spend with patients. In simplest form, for a linear regression I would use: Proc surveyreg; model time=complexity/ clparm adjrsq solution; weight visitweight; run; But, to model a sigmoid response, how should I write the code? Thanks in advance? Alan
... View more