ICHPS 2025 BART Workshop Materials

This repository hosts slides, data, and vignettes from the 2025 ICHPS BART Workshop.

Software dependencies

stochtree package

The stochtree R package is hosted on Github and has a dedicated docsite (general and R-specific).

The package is not [yet!] on CRAN, but can be installed directly from Github with the remotes package as follows

# install.packages("remotes")
remotes::install_github("StochasticTree/stochtree", ref="r-dev")

If you encounter issues with the above installation, it is potentially due to a missing / inaccessible C++ compiler. To troubleshoot, follow the instructions below for your platform.

MacOS

The recommended compiler toolchain for R packages on MacOS is xcode. This page from CRAN explains how to install xcode, as well as any other common MacOS C++ dependencies.

Windows

CRAN ships a special compiler / developer software toolchain for Windows called "Rtools". This landing page will help you find the proper version of Rtools for your system (it should be matched to your installed version of R, so if your R console says "R 4.4.2", then you should install Rtools44, and so on.)

Possum package

The possum (POSterior SUMmarization) package is also available on Github and can be installed via remotes::install_github

remotes::install_github("spencerwoody/possum")

Other dependencies

The vignettes require several other packages which can be installed from CRAN

pkg_list <- c("ggplot2", "latex2exp", "coda", "rpart", "rpart.plot", "tidyverse", "here")
install.packages(pkg_list)