gnm (version 0.8-1)

Symm: Symmetric Interaction of Factors

Description

Symm codes the symmetric interaction of factors having the same set of levels, for use in regression models of symmetry or quasi-symmetry.

Usage

Symm(...)

Arguments

...

one or more factors.

Value

• A factor whose levels index the symmetric interaction of all factors supplied as input.

See Also

Diag

Examples

if (require(gtools)) {
    row <- gl(4, 4, 16)
    col <- gl(4, 1, 16)
    symm4by4 <- Symm(row, col)
    matrix(symm4by4, 4, 4)
} else cat("Symm requires the gtools package to be installed
")