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Last data update: 2014.03.03

R: Class TSP - Symmetric traveling salesperson problem

TSP	R Documentation

Class TSP – Symmetric traveling salesperson problem

Description

Constructor to create an instance of a symmetric traveling salesperson problem (TSP) and some auxiliary methods.

Usage

## constructor
TSP(x, labels = NULL)

## coercion
as.TSP(x)

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

Arguments

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

Details

Objects of class TSP are internally represented as dist objects (use as.dist() to get the dist object).

Value

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

n_of_cities() returns the number of cities in x.

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

Author(s)

Michael Hahsler

Examples

data("iris")
d <- dist(iris[-5])

## create a TSP
tsp <- TSP(d)
tsp

## use some methods 
n_of_cities(tsp)
labels(tsp)
image(tsp)