Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Ensemble Topic Modelling

Avatar for Leland McInnes Leland McInnes
July 12, 2019
Research
490
1

Ensemble Topic Modelling

A short lightning talk on ensemble topic modelling with pLSA using the enstop package.

Avatar for Leland McInnes

Leland McInnes

July 12, 2019

More Decks by Leland McInnes

See All by Leland McInnes
PyNNDescent: Fast Approximate Nearest Neighbors with Numba
Avatar for Leland McInnes lmcinnes
0
1k
Word and Document Embeddings
Avatar for Leland McInnes lmcinnes
0
170
Topological Data Analysis
Avatar for Leland McInnes lmcinnes
1
360
Learning Topology: topological methods for unsupervised learning
Avatar for Leland McInnes lmcinnes
2
3.6k
A Guide to Dimension Reduction
Avatar for Leland McInnes lmcinnes
3
1.4k
UMAP: Uniform Manifold Approximation and Projection for Dimension Reduction
Avatar for Leland McInnes lmcinnes
2
2.7k

Other Decks in Research

See All in Research
FUSE-RSVLM: Feature Fusion Vision-Language Model for Remote Sensing
Avatar for SatAI.challenge satai
3
490
正規分布と最適化について
Avatar for koide3 koide3
0
110
Any-Optical-Model: A Universal Foundation Model for Optical Remote Sensing
Avatar for SatAI.challenge satai
3
470
業界横断 副業コンプライアンス調査 三者（副業者・本業先・発注者）におけるトラブル認知ギャップの構造分析
Avatar for fkske fkske
0
1.2k
AI Agentの精度改善に見るML開発との共通点 / commonalities in accuracy improvements in agentic era
Avatar for shimacos shimacos
6
1.6k
2026-01-30-MandSL-textbook-jp-cos-lod
Avatar for Yuka Egusa yegusa
1
1k
ICCV2025参加報告_採択されやすいワークショップの選び方
Avatar for 小林優斗 kobayashi31
0
110
Dual Quadric表現を用いた動的物体追跡とRGB-D・IMU制約の密結合によるオドメトリ推定
Avatar for Toyozo Shimada nanoshimarobot
0
340
【SIGGRAPH Asia 2025】Lo-Fi Photograph with Lo-Fi Communication
Avatar for Chinatsu Ozawa toremolo72
0
150
Earth AI: Unlocking Geospatial Insights with Foundation Models and Cross-Modal Reasoning
Avatar for SatAI.challenge satai
3
910
A History of Approximate Nearest Neighbor Search from an Applications Perspective
Avatar for Yusuke Matsui matsui_528
1
250
ウェブ・ソーシャルメディア論文読み会 第36回: The Stepwise Deception: Simulating the Evolution from True News to Fake News with LLM Agents (EMNLP, 2025)
Avatar for taichi_murayama hkefka385
0
220

Featured

See All Featured
30 Presentation Tips
Avatar for Ian Lurie portentint
PRO
1
270
Speed Design
Avatar for Sergey Chernyshev sergeychernyshev
33
1.6k
Bridging the Design Gap: How Collaborative Modelling removes blockers to flow between stakeholders and teams @FastFlow conf
Avatar for Kenny Baas-Schwegler baasie
0
510
Distributed Sagas: A Protocol for Coordinating Microservices
Avatar for Caitie McCaffrey caitiem20
333
22k
Color Theory Basics | Prateek | Gurzu
Avatar for Gurzu gurzu
0
290
Ecommerce SEO: The Keys for Success Now & Beyond - #SERPConf2024
Avatar for Aleyda Solis aleyda
1
1.9k
The Invisible Side of Design
Avatar for Vitaly Friedman smashingmag
302
52k
SEO in 2025: How to Prepare for the Future of Search
Avatar for Michael King ipullrank
3
3.4k
Building Flexible Design Systems
Avatar for Yesenia Perez-Cruz yeseniaperezcruz
330
40k
Amusing Abliteration
Avatar for ianozsvald ianozsvald
1
150
Navigating Algorithm Shifts & AI Overviews - #SMXNext
Avatar for Aleyda Solis aleyda
1
1.2k
The untapped power of vector embeddings
Avatar for Frank van Dijk frankvandijk
2
1.7k

Transcript

  1. Ensemble Topic Modelling Leland McInnes

  2. Model a corpus of documents in terms of underlying “topics”

  3. Topic Modelling as Matrix Factorization

  4. None
  5. None
  6. None
  7. None

  8. LDA and pLSA are probabilistic matrix factorization methods

  9. (Ensembles of) pLSA

  10. Performance?

  11. None

  12. Quality?

  13. None

  14. Instability?

  15. These are hard optimization problems

  16. Topics vary from one run to another

  17. What are the stable topics? Inspired by https://github.com/RaRe-Technologies/gensim/pull/2282

  18. None

  19. Each cluster represents a stable topic

  20. None

  21. • Greater stability • Determines number of topics automatically •

    Embarrassingly parallel computation

  22. Implementation

  23. sklearn API

  24. None

  25. https://github.com/lmcinnes/enstop

  26. pip install enstop