Table 5.2 from Hole and Campbell, 1985.

An adjacency matrix describing shared soil map boundary segments from the Soil Survey of Shawnee county, KS. This is table 5.2 from Hole and Campbell, 1985.

data(table5.2)

Format

An object of class matrix (inherits from array) with 18 rows and 18 columns.

References

Hole, F.D. and J.B. Campbell. Soil Landscape Analysis. Rowman and Allanheld, 1985.

Examples

data("table5.2")

if(requireNamespace("igraph")) {
  
  # note special incantation to get the "correct" graph structure
  g <- igraph::graph_from_adjacency_matrix(table5.2, mode = 'upper', diag = FALSE, weighted = TRUE)
  
  # visualize
  op <- par(no.readonly = TRUE)
  
  par(mar = c(0,0,0,0))
  plot(g)
  
  plot(g, vertex.size = sqrt(igraph::degree(g) * 25), vertex.label.family = 'sans')
  
  # find communities
  cm <- igraph::cluster_walktrap(g)
  plot(cm, g, vertex.label.family = 'sans')
  
  par(op)
}