Wrong formula for the Coleman–Liau index

[kduxin]

Hi Lee,

There are two places wrong in the formula.

First, the original Coleman-Liau counts the number of letters per 100 words. Whereas in the code, it counts the number of tokens per 100 words.

Second, it is wrong to account for "per 100 words" by dividing the number by 100.
Rather, it should be
$$n_{letters} / (n_{tokens} / 100)$$

As a result, the produced score is always around -15.0.

My installed lingfeat version is 1.00b19. Have you fixed it up ?

[brucewlee]

I see. You are correct.

Thank you @kduxin. I'll make the appropriate changes.

[MarioGalindoQ]

Hi Bruce,
I discovered the same bug.
In the file TraF.py at line 84, I think that the right code is:
result = 0.0588 * (self.n_char / self.n_token * 100) - 0.296 * (self.n_sent * 100 / self.n_token) - 15.8
Hope this will help you.
Thanks

[brucewlee]

Thank you Professor Queralt for the suggestions, including the one at #4 . I am planning to restructure this project and release a better version. Though I have been busy due to my job since releasing this library, I sincerely appreciate the continued attention.

[brucewlee]

The new update will likely be in November.