ATSP {TSP}

R Documentation

Class ATSP – Asymmetric traveling salesperson problem

Description

Constructor to create an instance of the asymmetric traveling salesperson problem (ATSP) and some auxiliary methods.

Usage

## constructor
ATSP(x, labels = NULL)

## coercion
as.ATSP(object)

## methods
## S3 method for class 'ATSP'
n_of_cities(x)
## S3 method for class 'ATSP'
image(x, order, col = gray.colors(64), ...)
## S3 method for class 'ATSP'
labels(object, ...)
## S3 method for class 'ATSP'
print(x, ...)

Arguments

x, object	an object (a square matrix) to be converted into an ATSP or, for the methods, an object of class ATSP.
labels	optional city labels. If not given, labels are taken from x.
col	color scheme for image.
order	order of cities as an integer vector or an object of class TOUR.
...	further arguments are passed on.

Details

Objects of class ATSP are internally represented by a matrix (use as.matrix() to get just the matrix).

Value

ATSP() returns x as an object of class ATSP.

n_of_cities() returns the number of cities in x.

labels() returns a vector with the names of the cities in x.

See Also

TOUR, insert_dummy, tour_length, solve_TSP.

Examples

data <- matrix(runif(10^2), ncol = 10, dimnames = list(1:10, 1:10))

atsp <- ATSP(data)
atsp

## use some methods
n_of_cities(atsp)
labels(atsp)

## calculate a tour
tour <- solve_TSP(atsp)

tour_length(atsp)
tour_length(atsp, tour)

image(atsp, tour)

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