Return the sample size (N.tfl) and vocabulary size
(V.tfl) of the type frequency list represented by a tfl
object, as well as class sizes (Vm.tfl) of the corresponding
frequency spectrum.
Note that these functions are not user-visible. They can be called
implicitly through the generic methods N, V and
Vm, applied to an object of type tfl.
# S3 method for tfl
N(obj, ...) # S3 method for tfl
V(obj, ...)
# S3 method for tfl
Vm(obj, m, ...)
an object of class tfl, representing an observed
type frequency list
non-negative integer value determining the frequency class \(m\) to be returned
additional arguments passed on from generic method will be ignored
N.tfl returns the sample size \(N\), V.tfl returns the
vocabulary size \(V\) (or expected vocabulary size \(E[V]\)), and
Vm.tfl returns the number of types that occur exactly \(m\)
times in the sample, i.e. the class size \(V_m\).
Only a single value is allowed for \(m\), which may also be 0.
In order to obtain multiple class sizes \(V_m\), convert the type
frequency list to a frequency spectrum with tfl2spc first.
For an incomplete type frequency list, Vm.tfl will return
NA if m is outside the range of listed frequencies
(i.e. for m < f.min or m > f.max).
N, V, Vm for the generic
methods and links to other implementations
tfl for details on type frequency list objects and links
to other relevant functions