# NOT RUN {
cf_4dim(
function(x) {x[1] + x[2]^2 + sin(2*pi*x[3])}
)
cf_4dim(function(x) x[1]*x[3] + sin(x[2]*x[4]), color.palette=heat.colors,
nover1=3, nover2=8, cex.var_names = .5)
cf_4dim(function(x) x[1]*x[3] + sin(x[2]*x[4]), color.palette=topo.colors,
nover1=3, nover2=8, cex.var_names = 1, over_srt = c(90,0),
edge_width=c(.1, .2), nlevels = 5)
# }
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