Return the sample size (N.spc), vocabulary size (V.spc)
and class sizes (Vm.spc) of the frequency spectrum represented
by a spc object. For an expected spectrum with variance
information, VV.spc returns the variance of the expected
spectrum size and VVm.spc the variances of individual spectrum
elements.
Note that these functions are not user-visible. They can be called
implicitly through the generic methods N, V, Vm,
VV and VVm, applied to an object of type spc.
# S3 method for spc
N(obj, ...) # S3 method for spc
V(obj, ...)
# S3 method for spc
Vm(obj, m, ...)
# S3 method for spc
VV(obj, N=NA, ...)
# S3 method for spc
VVm(obj, m, N=NA, ...)
an object of class spc, representing an observed or
expected frequency spectrum
positive integer value determining the frequency class \(m\) to be returned (or a vector of such values).
not applicable (this argument of the generic method is not
used by the implementation for spc objects and must not be
specified)
additional arguments passed on from generic method will be ignored
N.spc returns the sample size \(N\), V.spc returns the
vocabulary size \(V\) (or expected vocabulary size \(E[V]\)), and
Vm.spc returns a vector of class sizes \(V_m\) (ot the
expected spectrum elements \(E[V_m]\)).
For an expected spectrum with variances, VV.spc returns the
variance \(\mathop{Var}[V]\) of the expected vocabulary
size, and VVm.spc returns variances
\(\mathop{Var}[V_m]\) of the spectrum elements.
VV.spc a VVm.spc will fail if the object obj is
not an expected frequency spectrum with variance data.
For an incomplete frequency spectrum, Vm.spc (and
VVm.spc) will return NA for all spectrum elements that
are not listed in the object (i.e. for m > m.max).
N, V, Vm, VV,
VVm for the generic methods and links to other
implementations
spc for details on frequency spectrum objects and links
to other relevant functions