LDA
LDA groups documents by hidden topics, like sports, food, or science.
What it does
LDA groups documents by hidden topics, like sports, food, or science.
Topic Modeling: Finding themes • Latent: Hidden inside data
How it works
- Look at words in many documents.
- Guess which words often belong together.
- Show each document as a mix of topics.
Uses & Applications
- A news app can group articles by topic.
- A library can organize documents automatically.
- A teacher can sort student feedback into common themes.
In short
LDA finds topics in groups of documents.
Try it yourself
Discover topics in a pile of notes
Some notes talk about batteries; others talk about deliveries. The computer tries to discover groups of related words.
Your turn
Change one setting at a time. Reset example puts everything back.
Inspect document-topic mixtures
Step 1Why this happens