gg_matrix function

Plot a connectivity or a nodes-by-edges matrix

Plots an connectivity or a nodes-by-edges matrix.

gg_matrix(x, title)

Arguments

• x: a matrix object. An adjacency or nodes-by-edges matrix.
• title: a character of length 1. The caption of the figure.

Returns

A ggplot2 object.

Examples

library("chessboard")

# Import Adour sites ----
path_to_file <- system.file("extdata", "adour_survey_sampling.csv", 
                            package = "chessboard")
adour_sites  <- read.csv(path_to_file)

# Select first location ----
#adour_sites <- adour_sites[adour_sites$"location" == 1, ]

# Create node labels ----
adour_nodes <- create_node_labels(data     = adour_sites, 
                                  location = "location", 
                                  transect = "transect", 
                                  quadrat = "quadrat")

# Find edges with 1 degree of neighborhood (queen method) ----
adour_edges <- create_edge_list(adour_nodes, method = "queen", 
                                directed = FALSE)

# Get connectivity matrix ----
adour_con_matrix <- connectivity_matrix(adour_edges)

# Visualize matrix ----
gg_matrix(adour_con_matrix, title = "Connectivity matrix") +
  ggplot2::theme(axis.text = ggplot2::element_text(size = 6))