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intuition - What is perplexity? - Cross Validated
So perplexity represents the number of sides of a fair die that when rolled, produces a sequence with the same entropy as your given probability distribution. Number of States OK, so now that …
如何评价perplexity ai,会是未来搜索的趋势吗? - 知乎
Perplexity AI 不是搜索的终点,但可能是我们逃离“信息垃圾场”的起点。 它就像是搜索引擎界的 GPT-4:懂你说什么,还知道去哪儿找答案。 当然,要是它哪天推出 Pro 会员,也别忘了上拼 …
text mining - How to calculate perplexity of a holdout with Latent ...
Perplexity is seen as a good measure of performance for LDA. The idea is that you keep a holdout sample, train your LDA on the rest of the data, then calculate the perplexity of the holdout. The …
求通俗解释NLP里的perplexity是什么? - 知乎
困惑度 Perplexity 是衡量语言模型好坏的指标,为了更好地理解其意义,首先有必要回顾熵的概念。 根据信息论与编码的知识,我们知道 熵代表着根据信息的概率分布对其编码所需要的最短 …
Perplexity calculation in variational neural topic models
Since $\log p(X)$ is intractable in the NVDM, we use the variational lower bound (which is an upper bound on perplexity) to compute the perplexity following Mnih & Gregor (2014).
Perplexity formula in the t-SNE paper vs. in the implementation
Mar 11, 2019 · The perplexity formula in the official paper of t-SNE IS NOT the same as in its implementation. In the implementation (MATLAB): % Function that computes the Gaussian …
Comparing Perplexities With Different Data Set Sizes
Under this uniform language model, the perplexity is equal to the size of the vocabulary. Generally, perplexity captures the effective vocabulary size under the model. For instance, a …
Intuition behind perplexity parameter in t-SNE
Nov 28, 2018 · The perplexity can be interpreted as a smooth measure of the effective number of neighbors. The performance of SNE is fairly robust to changes in the perplexity, and typical …
information theory - Calculating Perplexity - Cross Validated
In the Coursera NLP course , Dan Jurafsky calculates the following perplexity: Operator(1 in 4) Sales(1 in 4) Technical Support(1 in 4) 30,000 names(1 in 120,000 each) He says the …
machine learning - Why does lower perplexity indicate better ...
The perplexity, used by convention in language modeling, is monotonically decreasing in the likelihood of the test data, and is algebraicly equivalent to the inverse of the geometric mean …