intuition - What is perplexity? - Cross Validated I came across term perplexity which refers to the log-averaged inverse probability on unseen data Wikipedia article on perplexity does not give an intuitive meaning for the same This perplexity
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How to find the perplexity of a corpus - Cross Validated If I understand it correctly, this means that I could calculate the perplexity of a single sentence What does it mean if I'm asked to calculate the perplexity on a whole corpus?
How to determine parameters for t-SNE for reducing dimensions? I will cite the FAQ from First for perplexity: How should I set the perplexity in t-SNE? The performance of t-SNE is fairly robust under different settings of the perplexity The most appropriate value depends on the density of your data Loosely speaking, one could say that a larger denser dataset requires a larger perplexity Typical values for the perplexity range between 5 and 50 For
Perplexity for different n-gram models - Cross Validated It's impossible to say Increasing n trades off variance in exchange for less bias The only way to know whether increasing n reduces perplexity is by already knowing how exactly how the text was generated In practice, unigram models tend to underfit on non-trivial text datasets 10-gram models trained on small datasets tend to overfit It's difficult and not really useful to hypothesize