3
$\begingroup$

I'm reading a machine learning paper, and in it, there is train and test NLL and PPL.

I know that NLL stands for "negative log-likelihood". But I don't know about PPL. What does it mean?

Improve this question
$\endgroup$

1 Answer 1

Reset to default
2
$\begingroup$

PPL stands for perplexity. This quantity is directly computable from the negative log-likelihood (and the number of samples), so it's odd that the authors would report both. A given sub-discipline tends to prefer one or the other.

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.