Efficient Tuning-Free Conformal Prediction R package ConformalSmallest version 1.0 An implementation of efficiency first conformal prediction (EFCP) and validity first conformal prediction (VFCP) that demonstrates both validity (coverage guarantee) and efficiency (width guarantee). To learn how to use it, check the vignettes for a quick tutorial. The package is based on the work by Yang Y., Kuchibhotla A.,(2021) <arxiv:2104.13871>. Software Depends: R (>= 3.5.0) Imports: glmnet, mvtnorm, stats, MASS, quantregForest Suggests: testthat (>= 3.0.0), knitr, rmarkdown, ggplot2, repr Yachong Yang <yachong@wharton.upenn.edu> Comprehensive R Archive Network (CRAN) Yachong Yang [aut, cre] GPL (>= 3) 2021-08-09 application/tgz https://CRAN.R-project.org/package=ConformalSmallest doi:10.32614/CRAN.package.ConformalSmallest