Plot clustering results

Produces a scatter plot matrix (pairs plot) of clustered data, colored by cluster assignment. For 2-column data a single scatter plot is produced instead. Noise points (NA cluster) are shown as grey crosses.

Usage

# S3 method for class 'petal_dbscan'
plot(
  x,
  xcol = NULL,
  ycol = NULL,
  pal = grDevices::hcl.colors(max(x$n_clusters, 2L), "Roma"),
  ...
)

# S3 method for class 'petal_hdbscan'
plot(
  x,
  xcol = NULL,
  ycol = NULL,
  pal = grDevices::hcl.colors(max(x$n_clusters, 2L), "Roma"),
  ...
)

# S3 method for class 'petal_optics'
plot(
  x,
  xcol = NULL,
  ycol = NULL,
  pal = grDevices::hcl.colors(max(x$n_clusters, 2L), "Roma"),
  ...
)

Arguments

x

A clustering result object.

xcol, ycol

Optional column name or index to plot on the x/y axis. When both are supplied, a single scatter plot is produced instead of a pairs matrix.

pal

Character vector of colours for clusters. Defaults to grDevices::hcl.colors(n, "Roma") where n is the number of clusters.

...

Additional arguments passed to pairs() or plot.default().

Value

x, invisibly.

Details

When xcol and ycol are supplied, a single scatter plot of those two variables is produced instead of the full pairs matrix. Columns can be specified by name or integer index.