Hi all.
I'm making some tests extracting the nbest list from moses (-n-best-list
option) with all models' weights set to 1 and I don't understand how do you get
the final LM score. I'm using srilm.
For instance, my best translation from Chinese to English on sentence 9 was
9 ||| after three hours . ||| d: 0 lm: -17.0614 tm: -7.41812 -0.944461
-4.79107 -2.87243 w: -4 ||| -37.0874
but if I run ngram alone with the same output sentence
echo "after three hours ." | ngram -order 5 -lm ../marie/lm/train.tok.en.lm
-ppl -
the result is very different
file -: 1 sentences, 4 words, 0 OOVs
0 zeroprobs, logprob= -7.40966 ppl= 30.3341 ppl1= 71.1892
I tried with some other values from my nbest list and I always found a big
difference between the two scores.
If my initial weight is 1, why are the scores so different? I suppose I am
misunderstanding something.
The moses command to obtain the n-best-list was
moses -f moses.ini -i ../../corpus/dev.zh -d 1 -tm 1 1 1 1 -lm 1 -w 1
-n-best-list devout.moses.nbest 10 -include-alignment-in-n-best true >
devout.moses 2> /dev/null
(yep, I'm not using the last tm weight) and the moses.ini file does not have
any weights.
--
Carlos A. Henríquez Q.
carlo...@gps.tsc.upc.es
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