SAFD — An R Package for Statistical Analysis of Fuzzy Data
The R package SAFD (Statistical Analysis of Fuzzy Data) provides basic tools for elementary statistics with one dimensional Fuzzy Data in the form of polygonal fuzzy numbers. In particular, the package contains functions for the standard operations on the class of fuzzy numbers (sum, scalar product, mean, Hukuhara difference, quantiles) as well as for calculating (Bertoluzza) distance, sample variance, sample covariance, sample correlation, and the Dempster-Shafer (levelwise) histogram. Moreover SAFD facilitates functions for the simulation of fuzzy random variables, for bootstrap tests for the equality of means as well as a function for linear regression given trapezoidal fuzzy data. The aim of this paper is to explain the functionality of the package and to illustrate its usage by various examples.
KeywordsFuzzy Number Sample Covariance Bootstrap Test Fuzzy Random Variable Fuzzy Data
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