TSP: Class TSP - Symmetric traveling salesperson problem

Description Usage Arguments Details Value Author(s) See Also Examples

Description

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

Usage

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## 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

See Also

TOUR, insert_dummy, tour_length, solve_TSP.

Examples

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

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

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

Example output

object of class 'TSP' 
150 cities (distance 'euclidean') 
[1] 150
  [1]   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18
 [19]  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36
 [37]  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54
 [55]  55  56  57  58  59  60  61  62  63  64  65  66  67  68  69  70  71  72
 [73]  73  74  75  76  77  78  79  80  81  82  83  84  85  86  87  88  89  90
 [91]  91  92  93  94  95  96  97  98  99 100 101 102 103 104 105 106 107 108
[109] 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126
[127] 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
[145] 145 146 147 148 149 150

TSP documentation built on May 2, 2019, 6:04 a.m.