#  File src/library/stats/R/reorder.factor.R
#  Part of the R package, https://www.R-project.org
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#  Copyright (C) 1995-2021 The R Core Team
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#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
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#  This program is distributed in the hope that it will be useful,
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reorder.default <- function(x, X, FUN = mean, ..., order = is.ordered(x), decreasing = FALSE)
{
    scores <- tapply(X = X, INDEX = x, FUN = FUN, ...)
    structure((if(order) ordered else factor)(x,
		levels = names(sort(scores, decreasing = decreasing, na.last = TRUE))),
	      scores = scores)
}