ISPSO

Isolated-Speciation-based Particle Swarm Optimization <https://idea.isnew.info/ispso.html>

ispso.R implements the Isolated-Speciation-based Particle Swarm Optimization algorithm published in Cho, Huidae, Kim, Dongkyun, Olivera, Francisco, Guikema, Seth D., 2011. Enhanced Speciation in Particle Swarm Optimization for Multi-Modal Problems. European Journal of Operational Research 213 (1), 15—23.

ISPSO is a multi-modal optimization algorithm that aims to discover global and local minima. This algorithm has successfully been used in stochastic rainfall generation, climate change, storm tracking, hydrology, and hydraulics studies.

Install fOptions from https://r-forge.r-project.org/:

install.packages("fOptions", repos="https://r-forge.r-project.org/")

Griewank Function

source("ispso.R")
source("funcs.R")
s <- list()
s$f <- griewank
s$D <- 2
s$xmin <- rep(-14, s$D)
s$xmax <- rep(14, s$D)
s$S <- 10 + floor(2*sqrt(s$D))
s$vmax <- (s$xmax-s$xmin)*0.1
s$vmax0 <- diagonal(s)*0.001
s$maxiter <- 2000
s$xeps <- 0.001
s$feps <- 0.0001
s$rprey <- diagonal(s)*0.0001
s$age <- 10
s$rspecies <- diagonal(s)*0.1
s$rnest <- diagonal(s)*0.01
s$.plot_distance_to_solution <- 0.01
ret <- ispso(s)

License

Copyright (C) 2008, Huidae Cho <https://idea.isnew.info>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses>.