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Clarify status of reshape2 #4908

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Mar 8, 2021
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Clarify status of reshape2 #4908

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2146efc
Clarify status of reshape2
hadley Feb 17, 2021
9dd75c8
Fix typo
hadley Feb 23, 2021
a809515
Update other mentions of reshape2
hadley Feb 23, 2021
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2 changes: 1 addition & 1 deletion man/dcast.data.table.Rd
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Expand Up @@ -51,7 +51,7 @@ From \code{v1.9.4}, \code{dcast} tries to preserve attributes wherever possible.

From \code{v1.9.6}, it is possible to cast multiple \code{value.var} columns and also cast by providing multiple \code{fun.aggregate} functions. Multiple \code{fun.aggregate} functions should be provided as a \code{list}, for e.g., \code{list(mean, sum, function(x) paste(x, collapse="")}. \code{value.var} can be either a character vector or list of length one, or a list of length equal to \code{length(fun.aggregate)}. When \code{value.var} is a character vector or a list of length one, each function mentioned under \code{fun.aggregate} is applied to every column specified under \code{value.var} column. When \code{value.var} is a list of length equal to \code{length(fun.aggregate)} each element of \code{fun.aggregate} is applied to each element of \code{value.var} column.

Historical note: \code{dcast.data.table} was originally designed as an enhancement to \code{reshape2::dcast} in terms of computing and memory efficiency. \code{reshape2} has since been deprecated, and \code{dcast} has had a generic defined within \code{data.table} since \code{v1.9.6} in 2015, at which point the dependency between the packages became more etymological than programmatic. We thank the \code{reshape2} authors for the inspiration.
Historical note: \code{dcast.data.table} was originally designed as an enhancement to \code{reshape2::dcast} in terms of computing and memory efficiency. \code{reshape2} has since been supersdeded in favour of \code{tidyr}, and \code{dcast} has had a generic defined within \code{data.table} since \code{v1.9.6} in 2015, at which point the dependency between the packages became more etymological than programmatic. We thank the \code{reshape2} authors for the inspiration.

}
\value{
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