how to calculate holdout perplexity what should be used to calculate perplexity of holdout can the perplexity of a holdout be a measure how to find perplexity of holdout calculate perplexity of holdout calculate perplexity of holdout how to calculate perplexity how to calculate perplexity of holdout with lda how to do perplexity analysis of holdout how do i calculate the perplexity of a holdout? calculate perplexity how do you calculate perplexity of a holdout calculation d of perplexity what is the perplexity of a holdout? how to calculate perplexity of holdout calculate perplexity of holdout calculate perplexity of holdout how do i calculate perplexity in lda how to calculate perplexity in lda calculate perplexity for a holdout