Package: cops Title: Cluster Optimized Proximity Scaling Version: 1.14-1 Authors@R: c(person(given="Thomas", family="Rusch", email="thomas.rusch@wu.ac.at", role = c("aut","cre"), comment = c(ORCID = "0000-0002-7773-2096")), person("Patrick","Mair",email="mair@fas.harvard.edu",comment=c(ORCID="0000-0003-0100-6511"),role=c("aut")),person("Kurt","Hornik",email = "Kurt.Hornik@R-project.org",comment = c(ORCID = "0000-0003-4198-9911"),role=c("ctb"))) Maintainer: Thomas Rusch Description: Multidimensional scaling (MDS) methods that aim at pronouncing the clustered appearance of the configuration (Rusch, Mair & Hornik, 2021, ). They achieve this by transforming proximities/distances with explicit power functions and penalizing the fitting criterion with a clusteredness index, the OPTICS Cordillera (Rusch, Hornik & Mair, 2018, ). There are two variants: One for finding the configuration directly (COPS-C) for any Minkowski distance with given explicit power transformations and implicit ratio, interval and nonmetric optimal scaling transformations (Borg & Groenen, 2005, ISBN:978-0-387-28981-6), and one for using the augmented fitting criterion to find optimal hyperparameters for the explicit transformations (P-COPS). The package contains various functions, wrappers, methods and classes for fitting, plotting and displaying a large number of different MDS models (most of the functionality in smacofx) in the COPS framework. The package further contains a function for pattern search optimization, the ``Adaptive Luus-Jaakola Algorithm'' (Rusch, Mair & Hornik, 2021,) and a functions to calculate the phi-distances for count data or histograms. Depends: R (>= 3.5.0), cordillera (>= 0.7-2), smacofx Imports: smacof, analogue, cmaes, crs, dfoptim, GenSA, minqa, NlcOptim, nloptr, pso, rgenoud, Rsolnp, subplex Suggests: R.rsp, rmarkdown VignetteBuilder: R.rsp License: GPL-2 | GPL-3 LazyData: true URL: https://r-forge.r-project.org/projects/stops/ RoxygenNote: 7.3.2 Encoding: UTF-8 Config/pak/sysreqs: cmake make libicu-dev libuv1-dev libssl-dev libx11-dev zlib1g-dev Repository: https://r-forge.r-universe.dev Date/Publication: 2026-01-18 13:38:14 UTC RemoteUrl: https://github.com/r-forge/stops RemoteRef: HEAD RemoteSha: a51c031eed4408589a889df5bd68990edba5c9a8 RemoteSubdir: pkg/cops NeedsCompilation: no Packaged: 2026-06-20 10:15:13 UTC; root Author: Thomas Rusch [aut, cre] (ORCID: ), Patrick Mair [aut] (ORCID: ), Kurt Hornik [ctb] (ORCID: )