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  \item{x}{an arbitrary \R object.}
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  \item{x}{an arbitrary \R object.}
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  \item{\dots}{arguments passed to methods (unused for the default method).}
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  \item{\dots}{arguments passed to methods (unused for the default method).}
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}
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}
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\details{
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\details{
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  The function \code{ts} is used to create time-series objects.  These
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  The function \code{ts} is used to create time-series objects.  These
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  are vector or matrices with class of \code{"ts"} (and additional
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  are vectors or matrices with class of \code{"ts"} (and additional
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  attributes) which represent data which has been sampled at equispaced
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  attributes) which represent data which has been sampled at equispaced
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  points in time.  In the matrix case, each column of the matrix
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  points in time.  In the matrix case, each column of the matrix
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  \code{data} is assumed to contain a single (univariate) time series.
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  \code{data} is assumed to contain a single (univariate) time series.
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  Time series must have at least one observation, and although they need
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  Time series must have at least one observation, and although they need
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  not be numeric there is very limited support for non-numeric series.
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  not be numeric there is very limited support for non-numeric series.