Addition of Läsbarhetsindex

[Nio-av]

I've writen code for calculating the Läsbarhetsindex (Björnsson, 1968).

LIX = 100*RWL+ASL

*Where*
RLW (Ratio of long Words to all words) = Number of Long Words / Number of Words
ASL (Average sentence length) = number of Words / Number of Sentences

and: Long Words have more than six characters.

This Readability-Score formula has been developed for Swedish, but also works for German and English. More Informations:

Ott,N.(2009). Information retrieval for language learning: An exploration of text difficulty measures. In ISCL master’s thesis. Universität Tübingen, Seminar für Sprachwissenschaft, Tübingen, Germany. Page 19

May I commit this additions direct to master-branch?

[DaveChild]

Absolutely, thanks for adding it!

[Nio-av]

See Pull Request #39. I haven't write access to this Repository.