brms
tinytex
brms  tinytex  

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brms

Bayesian Structural Equation Modeling using blavaan
[2] https://paulbuerkner.github.io/brms/

[Q] Correlated multivariate Beta model
Maybe something like the Logistic Normal ? (e.g. see this issue from brms). If that fits what you are looking for, you can use brms to generate the Stan code for you (brms::make_stan_code()) and work from that.

Stepbystep example of Bayesian ttest?
Okay so first off, I recommend that you read [this](https://link.springer.com/article/10.3758/s1342301612214) article about "The Bayesian New Statistics", which highlights estimation rather than hypothesis testing from a Bayesian perspective (see Fig. 1, second row, second column). Instead of a ttest, then, we can *estimate the difference* between two groups/variables. If you want to go deeper than JASP etc, I recommend that you use [brms](https://paulbuerkner.github.io/brms/), or, if you want to go even deeper, [Stan](https://mcstan.org/) (brms is a frontend to Stan).

[R] Are there methods for ridge and lasso regression that allow the introduction of weights to give more importance to some observations?
I think the brms package (https://github.com/paulbuerkner/brms) or the blavaan package (http://ecmerkle.github.io/blavaan/) have support for SEM. I've never done it myself, so I unfortunately can't give you any direction for that in particular. However, I have used stan in multilevel metaanalysis regression (combining multiple CRISPRa experiments to find determinants of CRISPRa activity, see https://github.com/timydaley/CRISPRasgRNAdeterminants/blob/master/metaAnalysis/NeuronAndSelfRenewalMetaMixtureRegression.Rmd) and had some success.

Package for :Generalized Mixed Effects Models for ZeroInflated Negative Binomial distributions ?
brms baby

Multiple observers
Could also be done using brms and the gr term. See this for the motivation behind this syntax.

I have a small sample size time series with potentially lagged predictor values which are also time series. What could be potential methods to analyse these data?
Anyway, I found I can include weights into the brm function by using gr(RE, by = var) to deal with the heterogeneous variance and it should automatically assume that each observation within a group is correlated according to the brms reference manual.

Brms: adding on a nonlinear component to working MLM model
This is what actually should work I must be declaring my variables incorrectly. The issue I'm having is that what you refer to as lin , I tried calling a few things, from b to LinPred (which worked in the link here: brms issue 47). When I've tried doing this, I receive errors that say "The following variables are missing from the dataset....[insert variable used to symbolize linear part of the model)". But I believe you're code is on the right path for what needs to be done I'll try altering my syntax to be sure it resembles yours let you know if it works.
tinytex
 Running Quarto Markdown in Docker
 TinyTeX – lightweight, crossplatform, portable, and easytomaintain LaTeX

Any LaTeX software on osx that won't need installing and works with XeLaTeX?
Some of the others have mentioned other installs, but they can pull down a lot of packages which might not be ideal if it's not your PC (even the TexLive install is quite chonky.) I'd personally recommend: TinyTex.

Knitting an Rmd file to PDF using TinyTex in RStudio Not Working
See https://yihui.org/tinytex

Error in knitting RMD file as PDF, Can anyone help me fix this as I want to knit rmd file to pdf
that will install a lightweight latex distribution ready to render your rmarkdown documents. just restart rstudio and give a try after this process (for more stuff, see https://yihui.org/tinytex/ )

Issue installing LaTex on Mac
Have you tried the things mentioned at the link? https://github.com/yihui/tinytex/issues/24

Installed MacTeX  but why is it almost 5GB in size?
There is the tinyTeX distribution which was designed for use with R, but can be used on its own as well. It's a subsetted version of TeX live and available from https://yihui.org/tinytex/

Install only makeglossaries in Ubuntu
If you'd like to install only a small subset of packages, there are projects like TinyTeX.

Install latex with Tinytex
Tinytex is a relative new Latex distribution by Yihui Xie from the R community. The distribution is tiny, less than 100mb, which is a great alternative to TexLive and MikTex for basic users.
 Can not wrap "luajithbtex"
What are some alternatives?
rstan  RStan, the R interface to Stan
miktex  the MiKTeX source code
stan  Stan development repository. The master branch contains the current release. The develop branch contains the latest stable development. See the Developer Process Wiki for details.
rmarkdown  Dynamic Documents for R
bambi  BAyesian ModelBuilding Interface (Bambi) in Python.
latex2e  The LaTeX2e kernel
stat_rethinking_2020  Statistical Rethinking Course Winter 2020/2021
pagedown  Paginate the HTML Output of R Markdown with CSS for Print
rBAPS  R implementation of the BAPS software for Bayesian Analysis of Population Structure
drake  An Rfocused pipeline toolkit for reproducibility and highperformance computing
testsaslinear  Common statistical tests are linear models (or: how to teach stats)
ffscrapr  R API Client for Fantasy Football League Platforms