expand: Expand a SOM network

In wccsom: SOM Networks for Comparing Patterns with Peak Shifts

Description

Increases the size of a network by a factor of 2 in both x and y directions; code vectors for new units are interpolated.

Usage

expand(somnet, plotit=FALSE)

Arguments

somnet	Object of class "wccsom", generated by wccsom.
plotit	If TRUE, plots the new network with the original units coloured white, the new ones red.

Details

For hexagonal grids, the six closest units are used for interpolation, weighted by distance; for rectangular grids, the four closest are used.

Value

Returns the new network.

Examples

data(cepha)
gr <- somgrid(3,3, "hexagonal")
set.seed(7)
x <- wccsom(cepha$patterns, grid=gr, trwidth=20, rlen=50)
x2 <- expand(x, plotit=TRUE)

wccsom documentation built on May 30, 2017, 12:52 a.m.