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as.data.frame(x, row.names = NULL, optional = FALSE, \dots)
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as.data.frame(x, row.names = NULL, optional = FALSE, \dots)
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\method{as.data.frame}{character}(x, \dots,
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\method{as.data.frame}{character}(x, \dots,
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              stringsAsFactors = default.stringsAsFactors())
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              stringsAsFactors = default.stringsAsFactors())
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\method{as.data.frame}{matrix}(x, row.names = NULL, optional = FALSE, \dots,
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\method{as.data.frame}{matrix}(x, row.names = NULL, optional = FALSE, \dots,
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              stringsAsFactors = default.stringsAsFactors())
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              stringsAsFactors = default.stringsAsFactors())
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is.data.frame(x)
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is.data.frame(x)
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}
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}
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\arguments{
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\arguments{
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  Character variables are converted to factor columns unless protected
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  Character variables are converted to factor columns unless protected
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  by \code{\link{I}}.
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  by \code{\link{I}}.
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  If a data frame is supplied, all classes preceding \code{"data.frame"}
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  If a data frame is supplied, all classes preceding \code{"data.frame"}
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  are stripped, and the row names are changed if that argument is supplied.
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  are stripped, and the row names are changed if that argument is supplied.
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  If \code{row.names = NULL}, row names are constructed from the names
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  If \code{row.names = NULL}, row names are constructed from the names
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  or dimnames of \code{x}, otherwise are the integer sequence
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  or dimnames of \code{x}, otherwise are the integer sequence
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  starting at one.  Few of the methods check for duplicated row names.
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  starting at one.  Few of the methods check for duplicated row names.
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  Names are removed from vector columns unless \code{\link{I}}.
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  Names are removed from vector columns unless \code{\link{I}}.
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}
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}