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% File src/library/stats/man/aggregate.Rd
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% File src/library/stats/man/aggregate.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 1995-2017 R Core Team
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% Copyright 1995-2018 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{aggregate}
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\name{aggregate}
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\alias{aggregate}
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\alias{aggregate}
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\alias{aggregate.default}
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\alias{aggregate.default}
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applied to all data subsets.}
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applied to all data subsets.}
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\item{simplify}{a logical indicating whether results should be
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\item{simplify}{a logical indicating whether results should be
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simplified to a vector or matrix if possible.}
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simplified to a vector or matrix if possible.}
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\item{drop}{a logical indicating whether to drop unused combinations
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\item{drop}{a logical indicating whether to drop unused combinations
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of grouping values. The non-default case \code{drop=FALSE} has been
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of grouping values. The non-default case \code{drop=FALSE} has been
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available since \R 3.3.0, and may change in some cases where unused
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amended for \R 3.5.0 to drop unused combinations.}
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combinations are still dropped.}
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\item{formula}{a \link{formula}, such as \code{y ~ x} or
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\item{formula}{a \link{formula}, such as \code{y ~ x} or
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\code{cbind(y1, y2) ~ x1 + x2}, where the \code{y} variables are
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\code{cbind(y1, y2) ~ x1 + x2}, where the \code{y} variables are
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numeric data to be split into groups according to the grouping
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numeric data to be split into groups according to the grouping
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\code{x} variables (usually factors).}
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\code{x} variables (usually factors).}
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\item{data}{a data frame (or list) from which the variables in formula
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\item{data}{a data frame (or list) from which the variables in formula
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