[R-sig-ME] How to activate the overdisp_fun function?

[Daniel Lüdecke]

Dear Adriaan,
the function is a code snippet that you need to copy/paste from the
referenced FAQ. However, there's an implementation in the
performance-package:

https://easystats.github.io/performance/reference/check_overdispersion.html

You can install that package from CRAN:
https://cran.r-project.org/web/packages/performance/index.html

Best
Daniel

-----Ursprüngliche Nachricht-----
Von: R-sig-mixed-models <r-sig-mixed-models-bounces using r-project.org> Im
Auftrag von Adriaan de Jong
Gesendet: Mittwoch, 9. März 2022 08:28
An: r-sig-mixed-models using r-project.org
Betreff: [R-sig-ME] How to activate the overdisp_fun function?

Dear list members,
For informed choices between poisson and negative binomial models, I've been
advised to check preliminary poisson models with the overdisp_fun function
in accordance with Ben Bolker's glmmFAQ github site (link below).
Unfortunately, I only receive the "Error in overdisp_fun(mod30) : could not
find function "overdisp_fun" message (for poisson glmer model "mod30"). I've
installed packages MASS, lme4, nlme, mgcv and glmmTMB and run my script
under R 4.1.2. Model "mod30" runs and plots flawless. Internet searches
haven't helped me. What am I doing wrong and/or where sits this overdisp_fun
function?
Thanks in advance for hints and comments,
Cheers,
Adjan

Adriaan "Adjan" de Jong
Associate professor
Swedish University of Agricultural Sciences



https://bbolker.github.io/mixedmodels-misc/glmmFAQ.html




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