EmiR: Evolutionary minimizer for R

Classical minimization methods, like gradient descent or quasi-Newton techniques,have been proved to struggle in dealing with optimization problems with a high-dimensional search space or subject to complex nonlinear constraints. In last decade, the interest on metaheuristic nature inspired algorithms has been growing steadily, due to their flexibility and effectiveness. EmiR is a package for R which implements several methauristic algorithms for optimization problems:

Unlike other available tools, EmiR can be used not only for unconstrained problems, but also for problems subjected to inequality constraints and for integer or mixed-integer problems.

Example of usage

miele_cantrell <- function(x) {
  x1 <- x[1]
  x2 <- x[2]
  x3 <- x[3]
  x4 <- x[4]
  value <- (exp(-x1) - x2)^4 + 100*(x2 - x3)^6 + (tan(x3 - x4))^4 + x1^8

p1 <- parameter("x1", -2, 2, FALSE)
p2 <- parameter("x2", -2, 2, FALSE)
p3 <- parameter("x3", -2, 2, FALSE)
p4 <- parameter("x4", -2, 2, FALSE)

conf_algo <- config_bat(iterations = 200, population_size = 100)
results <- minimize(algorithm_id = "BAT", 
                    obj_func = miele_cantrell, 
                    parameters = list(p1, p2, p3, p4),
                    config = conf_algo)