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\item{subset}{an optional vector specifying a subset of observations
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\item{subset}{an optional vector specifying a subset of observations
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to be used.}
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to be used.}
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\item{na.action}{a function which indicates what should happen when
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\item{na.action}{a function which indicates what should happen when
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the data contain \code{NA}s. Defaults to
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the data contain \code{NA}s. Defaults to
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\code{getOption("na.action")}.}
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\code{getOption("na.action")}.}
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\item{\dots}{further arguments to be passed to or from methods.}
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\item{\dots}{further arguments to be passed to or from methods.}
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}
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}
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\details{
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\details{
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\code{friedman.test} can be used for analyzing unreplicated complete
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\code{friedman.test} can be used for analyzing unreplicated complete
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block designs (i.e., there is exactly one observation in \code{y}
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block designs (i.e., there is exactly one observation in \code{y}
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for each combination of levels of \code{groups} and \code{blocks})
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for each combination of levels of \code{groups} and \code{blocks})
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where the normality assumption may be violated.
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where the normality assumption may be violated.
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48 |
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The null hypothesis is that apart from an effect of \code{blocks},
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49 |
The null hypothesis is that apart from an effect of \code{blocks},
|
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the location parameter of \code{y} is the same in each of the
|
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the location parameter of \code{y} is the same in each of the
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\code{groups}.
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\code{groups}.
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If \code{y} is a matrix, \code{groups} and \code{blocks} are
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If \code{y} is a matrix, \code{groups} and \code{blocks} are
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obtained from the column and row indices, respectively. \code{NA}'s
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obtained from the column and row indices, respectively. \code{NA}'s
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are not allowed in \code{groups} or \code{blocks}; if \code{y}
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55 |
are not allowed in \code{groups} or \code{blocks}; if \code{y}
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contains \code{NA}'s, corresponding blocks are removed.
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contains \code{NA}'s, corresponding blocks are removed.
|
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