[R-sig-ME] glmmTMB syntax to brm() syntax

[Simon Harmel]

Thank you so very much, Ben! And wow, the brm() version is extremely slow.

Simon

On Thu, Oct 24, 2024 at 11:11 AM Ben Bolker <bbolker using gmail.com> wrote:
>
>    See below.  The two models (glmmTMB and brms) give sufficiently
> similar estimates that I'm confident that the specifications match.
>
> set.seed(101)
> library(glmmTMB)
> library(brms)
> library(broom.mixed)
> library(tidyverse)
>
> dd <- data.frame(ID = rep(1:100, each = 10),
>                   TRIAL_INDEX = rep(1:10, 100),
>                   con = rnorm(1000))
> dd$pic_percent <- simulate_new(
>      ~ con + (0+con | ID) +
>          (0+con | TRIAL_INDEX),
>      ziformula = ~1,
>      family = beta_family(),
>      newdata = dd,
>      newparams = list(beta = c(0, 0.5), theta = rep(-1,2),
>                       betadisp = 1, betazi = -2))[[1]]
>
>
> m1 <- glmmTMB(pic_percent ~ con + (0+con | ID) +
>      (0+con | TRIAL_INDEX),
>          data=dd,
>          family = beta_family(),
>          ziformula = ~1)
>
> ##
> https://mvuorre.github.io/posts/2019-02-18-analyze-analog-scale-ratings-with-zero-one-inflated-beta-models/
> m2 <- brm(
>      bf(pic_percent ~ con + (0+con | ID) +
>             (0+con | TRIAL_INDEX),
>      zi = ~ 1),
>      data=dd,
>      family = zero_inflated_beta()
> )
>
>
> (purrr::map_dfr(list(glmmTMB = m1, brms = m2), tidy, .id = "model")
>      |> select(model, effect, component, group, term, estimate)
>      |> pivot_wider(names_from = model, values_from = estimate)
> )
>
>
>
> On 10/23/24 19:13, Simon Harmel wrote:
> > Hello all,
> >
> > I was wondering what is the closest equivalent of my glmmTMB syntax below
> > in brms::brm() syntax?
> >
> > glmmTMBglmmTMB(pic_percent ~ con +
> >                        (0+con | ID) +
> >                        (0+con | TRIAL_INDEX),
> >                      data=DATA,
> >          family = beta_family(),
> >          ziformula = ~1)
> >
> >
> > Thank you,
> >
> > Simon
> >
> >       [[alternative HTML version deleted]]
> >
> > _______________________________________________
> > R-sig-mixed-models using r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
>
> --
> Dr. Benjamin Bolker
> Professor, Mathematics & Statistics and Biology, McMaster University
> Director, School of Computational Science and Engineering
> * E-mail is sent at my convenience; I don't expect replies outside of
> working hours.
>
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