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% File src/library/graphics/man/fourfoldplot.Rd
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% File src/library/graphics/man/fourfoldplot.Rd
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% Part of the R package, https://www.R-project.org
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% Part of the R package, https://www.R-project.org
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% Copyright 1995-2007 R Core Team
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% Copyright 1995-2025 R Core Team
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% Distributed under GPL 2 or later
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% Distributed under GPL 2 or later
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\name{fourfoldplot}
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\name{fourfoldplot}
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\alias{fourfoldplot}
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\alias{fourfoldplot}
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\title{Fourfold Plots}
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\title{Fourfold Plots}
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  association is homogeneous across strata.  The fourfold display
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  association is homogeneous across strata.  The fourfold display
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  visualizes the pattern of association.  Note that the confidence rings
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  visualizes the pattern of association.  Note that the confidence rings
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  for the individual odds ratios are not adjusted for multiple testing.
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  for the individual odds ratios are not adjusted for multiple testing.
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}
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}
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\references{
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\references{
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  Friendly, M. (1994).
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  \bibshow{R:Friendly:1994b}
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  A fourfold display for 2 by 2 by \eqn{k} tables.
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  Technical Report 217, York University, Psychology Department.
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  \url{http://datavis.ca/papers/4fold/4fold.pdf}
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}
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}
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\seealso{
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\seealso{
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  \code{\link{mosaicplot}}
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  \code{\link{mosaicplot}}
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}
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}
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\examples{
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\examples{
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## Use the Berkeley admission data as in Friendly (1995).
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## Use the Berkeley admission data as in Friendly (1994).
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x <- aperm(UCBAdmissions, c(2, 1, 3))
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x <- aperm(UCBAdmissions, c(2, 1, 3))
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dimnames(x)[[2]] <- c("Yes", "No")
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dimnames(x)[[2]] <- c("Yes", "No")
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names(dimnames(x)) <- c("Sex", "Admit?", "Department")
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names(dimnames(x)) <- c("Sex", "Admit?", "Department")
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stats::ftable(x)
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stats::ftable(x)
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