TF-IDF
TF-IDF gives a word a high score when it is common in one document but rare in many others.
What it does
TF-IDF gives a word a high score when it is common in one document but rare in many others.
Corpus: All documents • Weight: Importance score
How it works
- Count how often a word appears in one document.
- Check whether the word is rare across many documents.
- Give rare-but-important words a higher score.
Uses & Applications
- A search tool can find documents that match a keyword.
- A library app can pick important words for a book summary.
- A news app can tag articles by important terms.
In short
It scores words by how useful they are for finding meaning.
Try it yourself
Find the words that make a note special
A useful clue word appears often in your note but not in every other note.
Your turn
Change one setting at a time. Reset example puts everything back.
Score document-specific words
Step 1Why this happens