Comments (4)
We get incorrect evaluation using M2Scorer as well (please double check).
Hypothesis:
It 's Thursday , is n't it ?
M2 file:
S Thursday , is it not ?
A 0 0|||Mec|||It 's|||REQUIRED|||-NONE-|||0
A 3 5|||Mec|||n't it|||REQUIRED|||-NONE-|||0
Based on my understanding, the reason is the initialization step of the levenshtein matrix. It creates the first row using the index of the hypothesis, i.e: the necessary edits to transform an empty sentence into the hypothesis. I think the start and end of such edits should always be 0.
My proposed solution is to change line 827
of file levenshtein.py
into:
edit = ("ins", 0, 0, '', second[j-1], 0) # always insert at the beginning
It appears to me that the modification will fix the problem, yet I am not sure whether other errors may arise.
Tam
from m2scorer.
I tried it. The generated edits are correct with the change. Can you make a pull request?
from m2scorer.
I tried it. The modification does not change the result of the 13 teams participating in CoNLL-2014 shared task (Table 7).
from m2scorer.
OK. Thanks.
from m2scorer.
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