Quantifying Similarity of Datasets and Multivariate Two- And k-Sample Testing R package DataSimilarity version 0.4.0 A collection of methods for quantifying the similarity of two or more datasets, many of which can be used for two- or k-sample testing. It provides newly implemented methods as well as wrapper functions for existing methods that enable calling many different methods in a unified framework. The methods were selected from the review and comparison of Stolte et al. (2024) <doi:10.1214/24-SS149>. An empirical comparison of the methods was performed in Stolte et al. (2026) <doi:10.48550/arXiv.2604.11458> for categorical data and in Stolte et al. (2026) <doi:10.48550/arXiv.2604.12327> for numeric data. Software Depends: R (>= 3.5.0) Imports: boot, stats Suggests: ade4, approxOT, Ball, caret, clue, cramer, crossmatch, dbscan, densratio, DWDLargeR, e1071, Ecume, energy, expm, FNN, GraphRankTest, gTests, gTestsMulti, HDLSSkST, hypoRF, kernlab, kerTests, KMD, knitr, LPKsample, Matrix, mvtnorm, nbpMatching, pROC, purrr, randtoolbox, rlemon, rpart, rpart.plot, testthat, nnet, synthpop, igraph, cluster Marieke Stolte <marieke.stolte@ibe.med.uni-muenchen.de> Comprehensive R Archive Network (CRAN) Marieke Stolte [aut, cre, cph] (ORCID: <https://orcid.org/0009-0002-0711-6789>), Luca Sauer [aut] (ORCID: <https://orcid.org/0009-0000-1086-023X>), David Alvarez-Melis [ctb] (Original python implementation of OTDD, <https://github.com/microsoft/otdd.git>), Nabarun Deb [ctb] (Original implementation of rank-based Energy test (DS), <https://github.com/NabarunD/MultiDistFree.git>), Bodhisattva Sen [ctb] (Original implementation of rank-based Energy test (DS), <https://github.com/NabarunD/MultiDistFree.git>) GPL (>= 3) 2026-05-15 application/tgz https://CRAN.R-project.org/package=DataSimilarity doi:10.32614/CRAN.package.DataSimilarity