plot.TSP: Plot a TSP Tour

In vrunge/M2algorithmique: Example of an Rcpp package for M2 Data Science students

Plot a TSP Tour

Description

This function plots the cities and the corresponding tour path on a 2D plane, showing the path connecting each city in the order given by the 'tour' vector.

Usage

## S3 method for class 'TSP'
plot(tour, data, main = "", value = "")

Arguments

tour	An integer vector of class 'TSP' representing the order of cities in the TSP solution. Each element of 'tour' corresponds to the index of a city in 'data'.
data	A numeric matrix or data frame containing the coordinates of the cities. The first column should represent the x-coordinates, and the second column should represent the y-coordinates of the cities.
main	A character string that will be displayed as a title for the plot. This is optional and defaults to an empty string.
value	A character string that will be displayed as a subtitle for the plot. This is optional and defaults to an empty string.

Details

The function uses the 'tour' vector to draw a path between cities in the order specified, and colors each segment based on its position in the sequence. The cities' coordinates are taken from the 'data' input, where each row corresponds to a city.

The plot shows the cities as points and the path as colored segments between them. The colors of the segments range from blue to red, where the first segment is blue and the last segment is red.

Examples

# Example usage
tour <- c(1, 2, 4, 3)
data <- data.frame(x = c(0, 1, 3, 5), y = c(0, 2, 3, 1))
plot.TSP(tour, data, main = "TSP Solution")

vrunge/M2algorithmique documentation built on April 5, 2025, 4:06 a.m.