Dictionary Meaning and Definition on 'Perplexity'
n : trouble or confusion resulting from complexity
- Perplexity \Per*plex"i*ty\, n.; pl. Perplexities. [L.
perplexitas: cf. F. perplexit['e].]
The quality or state of being perplexed or puzzled;
complication; intricacy; entanglement; distraction of mind
through doubt or difficulty; embarrassment; bewilderment;
By their own perplexities involved, They ravel more.
Wikipedia Meaning and Definition on 'Perplexity'
Perplexity is a measurement in information theory. It is defined as b raised to the power of entropy in base b, or more often as b raised to the power of cross-entropy in base b. The latter definition is commonly used to compare probability models.
The perplexity of a discrete probability distribution p is defined as
where H(p) is the entropy of the distribution and x ranges over events.
One may also define the perplexity of a random variable X as the perplexity of the distribution over its possible values x.[See more about Perplexity at Dictionary 3.0 Encyclopedia]
Words and phrases related to 'Perplexity'