Zero Inflated Poisson Factor Analysis R package ZIPFA version 0.8.1 Estimation methods for zero-inflated Poisson factor analysis (ZIPFA) on sparse data. It provides estimates of coefficients in a new type of zero-inflated regression. It provides a cross-validation method to determine the potential rank of the data in the ZIPFA and conducts zero-inflated Poisson factor analysis based on the determined rank. Software Depends: R (>= 3.2.0) Imports: Matrix, doParallel, foreach, optimx, trustOptim Tianchen Xu <tx2155@columbia.edu> Comprehensive R Archive Network (CRAN) Tianchen Xu [aut, cre] (<https://orcid.org/0000-0002-0102-7630>), Ryan T. Demmer [aut], Gen Li [aut] GPL (>= 2) 2020-03-31 application/tgz https://CRAN.R-project.org/package=ZIPFA doi:10.32614/CRAN.package.ZIPFA