Quality Measurements for Dimensionality Reduction R package DRquality version 0.2.1 Several quality measurements for investigating the performance of dimensionality reduction methods are provided here. In addition a new quality measurement called Gabriel classification error is made accessible, which was published in Thrun, M. C., Märte, J., & Stier, Q: "Analyzing Quality Measurements for Dimensionality Reduction" (2023), Machine Learning and Knowledge Extraction (MAKE), <DOI:10.3390/make5030056>. Software Imports: DatabionicSwarm Suggests: plotly, geometry, deldir, FCPS, ProjectionBasedClustering (>= 1.2.1), DataVisualizations, FastKNN, ggplot2, pcaPP,pracma, spdep, grid, igraph, cccd, sf Michael Thrun <m.thrun@gmx.net> Comprehensive R Archive Network (CRAN) Quirin Stier [aut], Florian Lerch [ctb], Julian Märte [aut], Hermann Tafo [ctb], Laukert Schlichting [ctb], Michael Thrun [aut, cph, cre] (ORCID: <https://orcid.org/0000-0001-9542-5543>) GPL-3 2023-10-12 application/tgz https://CRAN.R-project.org/package=DRquality doi:10.32614/CRAN.package.DRquality