bggum provides an implementation for the GeneralizedGraded Unfolding Model (GGUM) of Roberts, Donoghue, and Laughlin (2000)for R. Rather than provide tools for marginal maximum likelihoodestimation, which is available from the packageGGUMcurrently availableonCRAN, we provide an implementation of the MCMC algorithm in de laTorre et al (2006) as well as a Metropolis-coupled MCMC algorithm, bothcoded in C++ to allow for reasonable execution time usingRcpp (and using probabilitydistribution functions written in C++ fromRcppDist).
bggum is not yet on CRAN. You can install thedevelopment version from GitHub via
devtools::install_github("duckmayr/bggum")Before contributing, please consult the contributing guidelines inCONTRIBUTING.md.
GPL (>= 2)