gnm (version 1.1-1)

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(..., separator = ":")

Arguments

…

one or more factors.

separator

a character string of length 1 or more, to be used in naming the levels of the resulting interaction factor.

Value

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

See Also

Diag

Examples

# NOT RUN {
rowfac <- gl(4, 4, 16)
colfac <- gl(4, 1, 16)
symm4by4 <- Symm(rowfac, colfac)
matrix(symm4by4, 4, 4)
# }

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