N_V_Vm_tfl: Access Methods for Type Frequency Lists (zipfR)

In zipfR: Statistical Models for Word Frequency Distributions

Description

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.

Usage

  ## S3 method for class 'tfl'
N(obj, ...)

  ## S3 method for class 'tfl'
V(obj, ...)

  ## S3 method for class 'tfl'
Vm(obj, m, ...)

Arguments

obj	an object of class tfl, representing an observed type frequency list
m	non-negative integer value determining the frequency class m to be returned
...	additional arguments passed on from generic method will be ignored

Details

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).

Value

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.

See Also

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

zipfR documentation built on Jan. 8, 2021, 2:37 a.m.