Usage
## S3 method for class 'formula':
symmetry_test(formula, data, subset = NULL, \dots)
## S3 method for class 'SymmetryProblem':
symmetry_test(object,
teststat = c("max", "quad", "scalar"),
distribution = c("asymptotic", "approximate"),
alternative = c("two.sided", "less", "greater"),
xtrafo = trafo, ytrafo = trafo, scores = NULL,
check = NULL, ...)
## S3 method for class 'table':
symmetry_test(object, ...)Arguments
formula
a formula of the form
y1 + ... + yp ~ x1 + ... + xq | block where the variables
on the left and right hand side may be measured on arbitrary scales
and block is an optional factor for stratification.
data
an optional data frame containing the variables in the
model formula.
subset
an optional vector specifying a subset of observations
to be used.
object
an object inheriting from class SymmetryProblem or an
object of class table.
teststat
a character, the type of test statistic to be applied: either a
standardized scalar test statistic (scalar), or a
maximum type statistic (max) or a quadratic form
(quad).
alternative
a character, the alternative hypothesis must be
one of "two.sided" (default), "greater" or
"less". You can specify just the initial letter.
distribution
a character, the null distribution of the test statistic
can be computed exactly or can be approximated by its
asymptotic distribution (asymptotic)
or via Monte-Carlo resampling (approximate).
Alterna
xtrafo
a function of transformations (see trafo)
to be applied to the variables on the right hand side of
formula, see below. ytrafo
a function of transformations (see trafo)
to be applied to the variables on the left hand side of
formula, see below. scores
a named list of scores to be attached to ordered factors. In
case a variable is an unordered factor, it is coerced to
ordered first.
check
a function to be applied to objects of class
SymmetryTest in order to check for specific forms, see below.
...
further arguments to be passed to or from methods.