Anomaly Detection
Analysis of Reddit Users

Joseph Hamilton

Anomaly Detection - Definition

Flowers

Anomaly Detection - Common Applications

Fraud
Hack
Fault
Disease

The Problem of Trolls on Reddit

Troll

Platforms, Tools and Methods

Lotsa Logos

Platforms, Tools and Methods

Lotsa Logos Lotsa Logos

Platforms, Tools and Methods

Lotsa Logos Lotsa Logos Lotsa Logos

Platforms, Tools and Methods

Lotsa Logos Lotsa Logos Lotsa Logos Lotsa Logos

Platforms, Tools and Methods

Lotsa Logos Lotsa Logos Lotsa Logos Lotsa Logos Lotsa Logos

Troll Hunt - General Approach

Flow Chart

Troll Hunt - General Approach

Flow Chart

Troll Hunt - General Approach

Flow Chart

Troll Hunt - General Approach

Flow Chart

Troll Hunt - General Approach

Flow Chart

Troll Hunt - General Approach

Flow Chart

Troll Hunt - Algorithms

Agglomerative Clustering

DBSCAN

Isolation Forest

One-Class SVM

Troll Hunt - Sample Anomaly

anomaly

Troll Hunt - Sample Anomaly

This is not a troll.

troll
anomaly
AuthorRob_T_Firefly
Total Comments231
Total Subreddits76
Average Score33.82
Total Gilded2

This is a treasure.

treasure

Anomalies - Not Always Bad!

Performer
Trends

Sometimes surprises are good!

Joseph Hamilton

stitch in time saves nine
stitch in time saves nine