Symm codes the symmetric interaction of factors having the same set of levels, for use in regression models of symmetry or quasi-symmetry.
Symm
Symm(..., separator = ":")
one or more factors.
a character string of length 1 or more, to be used in naming the levels of the resulting interaction factor.
A factor whose levels index the symmetric interaction of all factors supplied as input.
Diag
# NOT RUN { rowfac <- gl(4, 4, 16) colfac <- gl(4, 1, 16) symm4by4 <- Symm(rowfac, colfac) matrix(symm4by4, 4, 4) # }
Run the code above in your browser using DataLab