Perplexity

[ilya oparin]

Diana,

Here's an abstract from SRILM manpages on ngram:

"Perplexity is given with two different
normalizations: counting all input tokens (``ppl'')
and excluding end-of-sentence tags (``ppl1'')."

--- Diana Durán <dianaduraiz at gmail.com> wrote:

> Hello,
> 
> I would like to know what the difference is between
> ppl and ppll at the
> output file when executing ngram.
> 
> Thank you.
> 


best regards,
Ilya


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