RE: Error when combining proportional residual error,

From: Leonid Gibiansky leonidg@metrumrg.com Subject: RE: [NMusers] Error when combining proportional residual error, Date: Wed, 02 Aug 2006 14:18:48 -0400 NONMEM does not transform data into the log form. As to the likelihood step evaluation, I think NONMEM uses Taylor expansion exp(eta)=1+eta effectively fitting the proportional rather than exponential error model. On the simulation step the exact exponential model is implemented. Leonid _______________________________________________________