# \#notation

**URL:** https://discourse.mc-stan.org/tag/notation/160.md

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## [Algebraic notation of complex nonlinear brms models](https://discourse.mc-stan.org/t/algebraic-notation-of-complex-nonlinear-brms-models/35187)

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**Author:** [@Fonseps](https://discourse.mc-stan.org/u/Fonseps)\
**Replies:** 1\
**Last updated:** [May 30, 2024, 2:56pm UTC](https://discourse.mc-stan.org/t/algebraic-notation-of-complex-nonlinear-brms-models/35187 "2024-05-30T14:56:07Z")

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Hello! I need help writing the algebraic notation of complex nonlinear brms models. I have already fitted the models with success. I now need to “translate” the brms notation I wrote to algebraic notation, to better und…

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## [Help converting brms notation to "standard" Bayesian mathematical notation](https://discourse.mc-stan.org/t/help-converting-brms-notation-to-standard-bayesian-mathematical-notation/33807)

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**Author:** [@Charles\_South](https://discourse.mc-stan.org/u/Charles_South)\
**Replies:** 0\
**Last updated:** [January 12, 2024, 1:20am UTC](https://discourse.mc-stan.org/t/help-converting-brms-notation-to-standard-bayesian-mathematical-notation/33807 "2024-01-12T01:20:22Z")

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I’m a bit embarrassed to ask for help as it exposes me as a Bayesian charlatan, but I’d rather show weakness than be wrong! I am working on a project that utilizes a Bayesian hierarchical model via brms. I understand the…

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## [Mathemathical notation for a brms model with a smooth term](https://discourse.mc-stan.org/t/mathemathical-notation-for-a-brms-model-with-a-smooth-term/20966)

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**Author:** [@piotr.koc](https://discourse.mc-stan.org/u/piotr.koc)\
**Replies:** 8\
**Last updated:** [July 25, 2023, 8:40pm UTC](https://discourse.mc-stan.org/t/mathemathical-notation-for-a-brms-model-with-a-smooth-term/20966 "2023-07-25T20:40:36Z")

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Hi, I’ve been struggling lately with the mathematical notation for a model with the s()term. Say, I have a model y ~ s(x), family = gaussian with prior(normal(0, 1), class = Intercept) prior(normal(0, 2)", class =…

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## [Help with notation for hierarchical gam in BRMS](https://discourse.mc-stan.org/t/help-with-notation-for-hierarchical-gam-in-brms/30913)

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**Author:** [@sea83](https://discourse.mc-stan.org/u/sea83)\
**Replies:** 1\
**Last updated:** [March 31, 2023, 10:28am UTC](https://discourse.mc-stan.org/t/help-with-notation-for-hierarchical-gam-in-brms/30913 "2023-03-31T10:28:02Z")

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I have been asked to include the notation for a model in the supplement of a paper we are submitting. I have come up with my best attempt at notating what we fit in brms, but I would greatly appreciate if anyone is able …

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## [Kurz/McElreath vs. Nalborczyk/Bürkner: question on notation on multivariate response correlation within SEM (via brms)](https://discourse.mc-stan.org/t/kurz-mcelreath-vs-nalborczyk-burkner-question-on-notation-on-multivariate-response-correlation-within-sem-via-brms/27178)

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**Author:** [@graden](https://discourse.mc-stan.org/u/graden)\
**Replies:** 5\
**Last updated:** [May 31, 2022, 2:38pm UTC](https://discourse.mc-stan.org/t/kurz-mcelreath-vs-nalborczyk-burkner-question-on-notation-on-multivariate-response-correlation-within-sem-via-brms/27178 "2022-05-31T14:38:19Z")

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Salut Stanners, PS: apologies for how long this is. I hope some others trying to learn notation may profit. I have fit a suite of models in brms linking hunter motivation (sale/consumption/both), behaviour (distance wa…

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## [Mathematical Notation for Mixed effect Model with stratified Intercept and Random Slope in brms](https://discourse.mc-stan.org/t/mathematical-notation-for-mixed-effect-model-with-stratified-intercept-and-random-slope-in-brms/24119)

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**Author:** [@L.Sch](https://discourse.mc-stan.org/u/L.Sch)\
**Replies:** 3\
**Last updated:** [September 13, 2021, 12:53pm UTC](https://discourse.mc-stan.org/t/mathematical-notation-for-mixed-effect-model-with-stratified-intercept-and-random-slope-in-brms/24119 "2021-09-13T12:53:01Z")

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Hello, I am trying to set up the mathematical notation for a multilevel model with stratified intercept that I want to fit with brm. Unfortunately I am very unsure if I am on the right track and find very little referen…

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## [Help with mathematical notation of multilevel model in brms](https://discourse.mc-stan.org/t/help-with-mathematical-notation-of-multilevel-model-in-brms/22652)

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**Author:** [@PBrams](https://discourse.mc-stan.org/u/PBrams)\
**Replies:** 1\
**Last updated:** [May 23, 2021, 2:26pm UTC](https://discourse.mc-stan.org/t/help-with-mathematical-notation-of-multilevel-model-in-brms/22652 "2021-05-23T14:26:03Z")

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Hi everyone, I have constructed a Poisson GLM as a part of a social network analysis, predicting counts of outgroup/ingroup connections over two different cohorts/years of a study programme. We are investigating whether…

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## [Basic model - Estimate variables in probit model and level height + noise simultaneously](https://discourse.mc-stan.org/t/basic-model-estimate-variables-in-probit-model-and-level-height-noise-simultaneously/20543)

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**Author:** [@Thomas88](https://discourse.mc-stan.org/u/Thomas88)\
**Replies:** 12\
**Last updated:** [April 22, 2021, 9:57am UTC](https://discourse.mc-stan.org/t/basic-model-estimate-variables-in-probit-model-and-level-height-noise-simultaneously/20543 "2021-04-22T09:57:33Z")

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As a true beginner to Stan I’ve been working on a very basic probit model. It works well, please see R code and Stan code below. However, I want to extend the model where \[0,1\] is a latent state reflecting the probabili…

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## [Mathematical notation for a brms model](https://discourse.mc-stan.org/t/mathematical-notation-for-a-brms-model/20877)

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**Author:** [@Ax3man](https://discourse.mc-stan.org/u/Ax3man)\
**Replies:** 8\
**Last updated:** [February 19, 2021, 12:49am UTC](https://discourse.mc-stan.org/t/mathematical-notation-for-a-brms-model/20877 "2021-02-19T00:49:33Z")

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I’m trying to figure out the correct notation for a model I’ve fitted in brms. The model is basically of the following form: y ~ factor + covariate + (0 + factor | group1) + (1 | group2) Note that there is a population…

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## [Definition of Hierarchy vs. Level](https://discourse.mc-stan.org/t/definition-of-hierarchy-vs-level/17456)

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**Author:** [@anon79882417](https://discourse.mc-stan.org/u/anon79882417)\
**Replies:** 4\
**Last updated:** [August 23, 2020, 12:01am UTC](https://discourse.mc-stan.org/t/definition-of-hierarchy-vs-level/17456 "2020-08-23T00:01:45Z")

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Here’s what I think these mean: Definition Hierarchy For any parameter that has a prior, we can assign a hyper prior to that prior. We call this parameter a hyperparameter, and this submodel hierarchical. (This is how I…