Access Methods for Type Frequency Lists (zipfR)
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 class 'tfl' N(obj, ...) ## S3 method for class 'tfl' V(obj, ...) ## S3 method for class 'tfl' Vm(obj, m, ...)
obj |
an object of class |
m |
non-negative integer value determining the frequency class m to be returned |
... |
additional arguments passed on from generic method will be ignored |
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.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.
tfl for details on type frequency list objects and links
to other relevant functions
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