O Iago  Jan 27, 2025

A quirk of nlme::varIdent

https://jepusto.com/posts/varIdent-function-in-nlme/

#RStats #nlme

A quirk of nlme::varIdent – James E. Pustejovsky

Wherein I document how to control the reference level in models that use nlme::varIdent() for specifying a variance structure.

James E. Pustejovsky
SaraJul 14, 2023

#JOB:
Senior #Research #Scientist, #Modeling and #Simulation

Arvinas Inc. - New Haven, United States

- Using modeling and simulation to solve problems in #pharmaceutical R&D.

More Info: https://www.researchgate.net/job/998766_Senior_Research_Scientist_Modeling_and_Simulation

#R #coding #NLME #PopulationModels #Statistics #PhD #DataAnalysis #Nonmem #Monolix

Show threadJustin WilkinsDec 24, 2022
@AbuMirchi @damiacer Perhaps they’d like to fund development of an open source #NLME #Pharmacometrics model development tool
Show threadStephen WildDec 6, 2022

@statstas @GaborBekes

Genuine question: Aren't you able to use weights with #nlme or #lme4 in R? Or are they doing something different with the weights compared with Stata?

Or is this one of those things where clustering and weights cause R to explode?

Show threadJustin WilkinsNov 8, 2022
I'm on fosstodon.org because I do a lot of #rstats development, most notably as a member of the #nlmixr2 development team. nlmixr2 is a set of packages - let's call it the #mixrverse - for R that provides an #OpenSource alternative for nonlinear mixed-effects (#NLME) model development, which are the core of most #Pharmacometrics workflows (amongst others).