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

In CEGO: Combinatorial Efficient Global Optimization

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")

Arguments

distanceMatrix	Matrix that collects the distances between travelled locations.
type	Can be "Cycle" (return to start, default) or "Path" (no return to start).

Value

the function of type cost=f(permutation)

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)

CEGO documentation built on May 29, 2024, 3:35 a.m.