plot_2d_scaling: Constructs a 2-dimensional scaling plot based on a given dissimilarity matrix.

Description

plot_2d_scaling represents a 2-dimensional scaling plane starting from a dissimilarity matrix.

Usage

plot_2d_scaling(distance_matrix, cluster_labels = NULL, title = "")

Value

The 2-dimensional scaling plane.

Arguments

distance_matrix: A distance matrix.
cluster_labels: The labels associated with the elements involving the entries in distance_matrix. The points in the plot are coloured according to these labels. If no labels are provided (default), all points are represented in the same colour.
title: The title of the graph (default is no title).

Author

Ángel López-Oriona, José A. Vilar

Details

Given a distance matrix, the function constructs the corresponding 2-dimensional scaling, which is a 2d plane in which the distances between the points represent the original distances as correctly as possible. If the vector cluster_labels is provided to the function, points in the 2d plane are coloured according to the given class labels.

Examples

Run this code

distance_matrix_qcd <- dis_qcd(SyntheticData1$data[1 : 30]) # Computing the pairwise
# distance matrix for the first 30 elements in dataset SyntheticData1 based on dis_qcd
plot_2d_scaling(distance_matrix_qcd, cluster_labels = SyntheticData1$classes[1 : 30])
# Constructing the corresponding 2d-scaling plot. Each class is represented
# in a different colour

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