Statistical Modelling for Plant Size Distributions R package ForestFit version 2.4.3 CRAN Task View: Distributions (https://CRAN.R-project.org/view=Distributions) Developed for the following tasks. 1 ) Computing the probability density function, cumulative distribution function, random generation, and estimating the parameters of the eleven mixture models. 2 ) Point estimation of the parameters of two - parameter Weibull distribution using twelve methods and three - parameter Weibull distribution using nine methods. 3 ) The Bayesian inference for the three - parameter Weibull distribution. 4 ) Estimating parameters of the three - parameter Birnbaum - Saunders, generalized exponential, and Weibull distributions fitted to grouped data using three methods including approximated maximum likelihood, expectation maximization, and maximum likelihood. 5 ) Estimating the parameters of the gamma, log-normal, and Weibull mixture models fitted to the grouped data through the EM algorithm, 6 ) Estimating parameters of the nonlinear height curve fitted to the height - diameter observation, 7 ) Estimating parameters, computing probability density function, cumulative distribution function, and generating realizations from gamma shape mixture model introduced by Venturini et al. (2008) <doi:10.1214/07-AOAS156> , 8 ) The Bayesian inference, computing probability density function, cumulative distribution function, and generating realizations from univariate and bivariate Johnson SB distribution, 9 ) Robust multiple linear regression analysis when error term follows skewed t distribution, 10 ) Estimating parameters of a given distribution fitted to grouped data using method of maximum likelihood, and 11 ) Estimating parameters of the Johnson SB distribution through the Bayesian, method of moment, conditional maximum likelihood, and two - percentile method. Software Depends: R(>= 3.4.4) Imports: ars, pracma Mahdi Teimouri <teimouri@aut.ac.ir> Comprehensive R Archive Network (CRAN) Mahdi Teimouri [aut, cre, cph, ctb] (ORCID: <https://orcid.org/0000-0002-5371-9364>) GPL (>= 2) 2025-01-09 application/tgz https://CRAN.R-project.org/package=ForestFit doi:10.32614/CRAN.package.ForestFit