Calculate the Standardized Difference for Numeric, Binary and Category Variables R package stddiff version 3.1 Contains three main functions including stddiff.numeric(), stddiff.binary() and stddiff.category(). These are used to calculate the standardized difference between two groups. It is especially used to evaluate the balance between two groups before and after propensity score matching. Software Zhicheng Du<dgdzc@hotmail.com> Comprehensive R Archive Network (CRAN) Zhicheng Du, Yuantao Hao GPL-3 2022-06-10 application/tgz https://CRAN.R-project.org/package=stddiff doi:10.32614/CRAN.package.stddiff