Tools to Deal with Fuzzy Numbers R package FuzzyNumbers version 0.4-7 S4 classes and methods to deal with fuzzy numbers. They allow for computing any arithmetic operations (e.g., by using the Zadeh extension principle), performing approximation of arbitrary fuzzy numbers by trapezoidal and piecewise linear ones, preparing plots for publications, computing possibility and necessity values for comparisons, etc. Software Depends: R (>= 3.0.0), methods, grDevices, graphics, stats Suggests: knitr, digest Marek Gagolewski <marek@gagolewski.com> Comprehensive R Archive Network (CRAN) Marek Gagolewski [aut, cre] (ORCID: <https://orcid.org/0000-0003-0637-6028>), Jan Caha [ctb] LGPL (>= 3) 2021-11-15 application/tgz https://CRAN.R-project.org/package=FuzzyNumbers doi:10.32614/CRAN.package.FuzzyNumbers