Plotting functions for SOM results.

`somgrid(xdim = 8, ydim = 6, topo = c("rectangular", "hexagonal"))`# S3 method for somgrid
plot(x, type = "p", ...)

# S3 method for SOM
plot(x, ...)

xdim, ydim

dimensions of the grid

topo

the topology of the grid.

x

an object inheriting from class `"somgrid"`

or `"SOM"`

.

type, …

graphical parameters.

For `somgrid`

, an object of class `"somgrid"`

, a list with
components

a two-column matrix giving locations for the grid points.

as in the arguments to `somgrid`

.

The class `"somgrid"`

records the coordinates of the grid to be
used for (batch or on-line) SOM: this has a plot method.

The plot method for class `"SOM"`

plots a `stars`

plot of the representative at each grid point.

Venables, W. N. and Ripley, B. D. (2002)
*Modern Applied Statistics with S.* Fourth edition. Springer.