`circularp' returns the `circularp' attribute (or `NULL'). `circularp<-' sets the `circularp' attribute.
circularp(x)
circularp(x) <- value
a vector or a matrix of circular data.
a vector of length 6 or a list with six components: type, units, template, modulo, zero and rotation.
The circularp
attribute is a list of six elements: type, units,
template, modulo, zero and rotation; see circular
for
their meaning.
Assignments are checked for consistency.
Assigning NULL
removes the circularp
attribute
and any "circular"
class of x
.
# NOT RUN {
x <- pi
circularp(x) # now NULL
circularp(x) <- list(type="angles", units="radians", template="none",
modulo="asis", zero=0, rotation="counter")
circularp(x)
x
class(x) <- "circular" # now we set also the class so that print.circular is used
x
# }
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