Implement Yule's K lexical diversity index

dpalmasan / TRUNAJOD2.0

An easy-to-use library to extract indices from texts.

https://trunajod20.readthedocs.io/en/latest/

MIT License

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Closed dpalmasan closed 3 years ago

dpalmasan commented 3 years ago

The Yule's K is defined as:

$K=10^{-4}\displaystyle\frac{\sum{r^2V_r-N}}{N^2}$

With $r=1,2,\ldots$ , and $V_r$ is the number of words occurring $r$ times in a text containing $N$ words. Unit tests should be added as well.