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Bayesian Modeling with RJAGS

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Updated 12/2024

In this course, you'll learn how to implement more advanced Bayesian models using RJAGS.

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RProbability & Statistics4 hours15 videos58 exercises4,650 XP7,364Statement of Accomplishment

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Course Description

The Bayesian approach to statistics and machine learning is logical, flexible, and intuitive. In this course, you will engineer and analyze a family of foundational, generalizable Bayesian models. These range in scope from fundamental one-parameter models to intermediate multivariate & generalized linear regression models. The popularity of such Bayesian models has grown along with the availability of computing resources required for their implementation. You will utilize one of these resources - the rjags package in R. Combining the power of R with the JAGS (Just Another Gibbs Sampler) engine, rjags provides a framework for Bayesian modeling, inference, and prediction.

Prerequisites

Fundamentals of Bayesian Data Analysis in R Introduction to the Tidyverse

1

Introduction to Bayesian Modeling

The prior model

Simulating a Beta prior

Comparing & contrasting Beta priors

Which prior?

Data & the likelihood

Simulating the dependence of X on p

Approximating the likelihood function

Interpreting the likelihood function

The posterior model

Define, compile, and simulate

Updating the posterior

Influence of the prior & data on the posterior

2

Bayesian Models & Markov Chains

The Normal-Normal model

Normal-Normal priors

Sleep study data

Insights from the prior and data

Simulating the Normal-Normal in RJAGS

Define, compile, & simulate the Normal-Normal

Posterior insights on sleep deprivation

Markov chains

Storing Markov chains

Markov chain trace plots

Markov chain density plots

Markov chain diagnostics & reproducibility

Multiple chains

Naive standard errors

Reproducibility

3

Bayesian Inference & Prediction

A simple Bayesian regression model

Regression priors

Visualizing the regression priors

Weight & height data

Bayesian regression in RJAGS

Define, compile, & simulate the regression model

Regression Markov chains

Posterior estimation & inference

Posterior point estimates

Posterior credible intervals

Posterior probabilities

Posterior prediction

Inference for the posterior trend

Calculating posterior predictions

Posterior predictive distribution

4

Multivariate & Generalized Linear Models

Bayesian regression with a categorical predictor

RailTrail sample data

RJAGS simulation with categorical variables

Interpreting categorical coefficients

Inference for volume by weekday

Multivariate Bayesian regression

Re-examining the RailTrail data

RJAGS simulation for multivariate regression

Interpreting multivariate regression parameters

Posterior inference for multivariate regression

Bayesian Poisson regression

RJAGS simulation for Poisson regression

Plotting the Poisson regression model

Inference for the Poisson rate parameter

Poisson posterior prediction

Bayesian Modeling with RJAGS

Course
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