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diff --git a/demo-standard.md b/demo-standard.md index 20d887f..1e1ea75 100644 --- a/demo-standard.md +++ b/demo-standard.md @@ -72,13 +72,15 @@ A minimal, grid-based setup for Marp presentations: The TF-IDF model for term weighting: -$$\text{tf-idf}(t, d, D) = \text{tf}(t, d) \times \text{idf}(t, D)$$ +$\text{tf-idf}(t, d, D) = \text{tf}(t, d) \times \text{idf}(t, D)$ Where term frequency is: -$$\text{tf}(t, d) = \frac{f_{t,d}}{\sum_{t'\in d} f_{t',d}}$$ +$\text{tf}(t, d) = \frac{f_{t,d}}{\sum_{t'\in d} f_{t',d}}$ And inverse document frequency: -$$\text{idf}(t, D) = \log \frac{|D|}{|\{d \in D : t \in d\}|}$$ +$\text{idf}(t, D) = \log \frac{|D|}{|\{d \in D : t \in d\}|}$ + +<div class="cite">[Sparck Jones, 1972]</div> --- |