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\name{nobs}
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\name{nobs}
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\alias{nobs}
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\alias{nobs}
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\alias{nobs.default}
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\alias{nobs.default}
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\title{
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\title{
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  Extract the Number of Observations from a Fit.
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  Extract the Number of Observations from a Fit
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}
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}
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\description{
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\description{
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  Extract the number of \sQuote{observations} from a model fit.  This is
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  Extract the number of \sQuote{observations} from a model fit.  This is
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  principally intended to be used in computing BIC (see \code{\link{AIC}}).
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  principally intended to be used in computing BIC (see \code{\link{AIC}}).
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}
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}
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nobs(object, ...)
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nobs(object, ...)
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\method{nobs}{default}(object, use.fallback = FALSE, ...)
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\method{nobs}{default}(object, use.fallback = FALSE, ...)
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}
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}
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\arguments{
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\arguments{
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  \item{object}{A fitted model object.}
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  \item{object}{a fitted model object.}
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  \item{use.fallback}{logical: should fallback methods be used to try to
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  \item{use.fallback}{logical: should fallback methods be used to try to
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    guess the value?}
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    guess the value?}
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  \item{\dots}{Further arguments to be passed to methods.}
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  \item{\dots}{further arguments to be passed to methods.}
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}
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}
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\details{
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\details{
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  This is a generic function, with an S4 generic in package \pkg{stats4}.
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  This is a generic function, with an S4 generic in package \pkg{stats4}.
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  There are methods in this package for objects of classes
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  There are methods in this package for objects of classes
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  \code{"\link{lm}"}, \code{"\link{glm}"}, \code{"\link{nls}"} and
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  \code{"\link{lm}"}, \code{"\link{glm}"}, \code{"\link{nls}"} and