CEGO (version 2.4.3)

benchmarkGeneratorTSP: Create (Asymmetric) Travelling Salesperson Problem (TSP) Benchmark

Description

Creates a benchmark function for the (Asymmetric) Travelling Salesperson Problem. Path (Do not return to start of tour. Start and end of tour not fixed.) or Cycle (Return to start of tour). Symmetry depends on supplied distance matrix.

Usage

benchmarkGeneratorTSP(distanceMatrix, type = "Cycle")

Value

the function of type cost=f(permutation)

Arguments

distanceMatrix

Matrix that collects the distances between travelled locations.

type

Can be "Cycle" (return to start, default) or "Path" (no return to start).

See Also

benchmarkGeneratorQAP, benchmarkGeneratorFSP, benchmarkGeneratorWT

Examples

set.seed(1)
#create 5 random locations to be part of a tour
n=5
cities <- matrix(runif(2*n),,2)
#calculate distances between cities
cdist <- as.matrix(dist(cities))
#create objective functions (for path or cycle)
fun1 <- benchmarkGeneratorTSP(cdist, "Path") 
fun2 <- benchmarkGeneratorTSP(cdist, "Cycle") 
#evaluate
fun1(1:n)
fun1(n:1)
fun2(n:1)
fun2(1:n)