84 items
Matching Clustering to Data Shape
Slides / VideoAnomaly Detection with Unsupervised Methods
Slides / VideoAssociation Rule Learning Basics
Slides / VideoClustering Evaluation Metrics
Slides / VideoHard vs Soft Clustering
Slides / VideoGaussian Mixture Models and Soft Clustering
Slides / VideoDensity-Based Clustering: DBSCAN
Slides / VideoDendrograms and Cluster Hierarchies
Slides / VideoHierarchical Clustering Explained
Slides / VideoDistance and Similarity Metrics
Slides / VideoTypes of Unsupervised Learning Tasks
Slides / VideoCommon Applications of Clustering
Slides / VideoK-Means Limitations and Assumptions
Slides / VideoChoosing K: Elbow and Silhouette
Slides / VideoK-Means Clustering Algorithm
Slides / VideoWhat Clustering Is and Its Goal
Slides / Videot-SNE Cluster Visualization
Code QuizMean Shift Bandwidth Parameter
Code QuizAgglomerative vs Divisive
QuizDBSCAN Parameters
QuizDBSCAN Basics
QuizHow K-Means Works
QuizReading a Dendrogram
QuizHandling Outliers
QuizDistance Metrics
QuizUnsupervised Anomaly Detection
QuizClustering Applications
QuizCurse of Dimensionality
QuizExternal Metrics: ARI and NMI
QuizInternal Evaluation Metrics
QuizChoosing a Clustering Algorithm
QuizSilhouette Score
QuizGaussian Mixture Models
QuizK-Means++ Initialization
QuizWard Linkage
QuizApriori and Support
QuizK-Means Limitations
QuizHard vs Soft Assignment
QuizThe Elbow Method
QuizCounting Points per Cluster
Code QuizAdjusted Rand Index Arguments
Code QuizHard vs Soft Clustering Output
Code QuizPCA fit/transform Order
Code QuizPredicting Cluster for New Point
Code QuizK-Means n_init Setting
Code QuizPairwise Distance Matrix
Code QuizK-Means Convergence Tolerance
Code QuizAgglomerative Merge Step
Code QuizDBSCAN Core Point Check
Code QuizEM E-Step vs M-Step
Code QuizSingle Linkage Distance
Code QuizDBSCAN Parameter Order
Code QuizGMM Responsibilities Normalization
Code QuizDBSCAN Noise Labeling
Code QuizCutting a Dendrogram
Code QuizElbow Method for K
Code QuizSilhouette Score Formula
Code QuizK-Means++ Initialization
Code QuizEuclidean Distance to Centroids
Code QuizK-Means Inertia Calculation
Code QuizCosine vs Euclidean Distance
Code QuizK-Means Update Step
Code QuizK-Means Assignment Step
Code QuizExternal Metrics and ARI
FlashcardReal-World Unsupervised Applications
FlashcardUnsupervised Anomaly Detection
FlashcardChallenges of Evaluating Unsupervised Learning
FlashcardAssociation Rule Learning (Apriori)
FlashcardInternal Cluster Evaluation Metrics
FlashcardClustering Algorithm Families
Flashcardt-SNE and UMAP
FlashcardDimensionality Reduction Overview
FlashcardK-Means Algorithm
FlashcardGaussian Mixture Models
FlashcardLinkage Criteria
FlashcardK-Means Limitations
FlashcardSilhouette Score
FlashcardDistance Metrics
FlashcardHard vs Soft Clustering
FlashcardDBSCAN
FlashcardDendrograms
FlashcardAgglomerative Clustering
FlashcardK-Means++ Initialization
FlashcardElbow Method
FlashcardSilhouette Score Formula
Spot the reversed terms in this silhouette calculation.
def silhouette(a, b):
# a = mean intra-cluster distance
# b = mean nearest-cluster distance
return (a - b) / max(a, b)What is the bug in this silhouette-score formula?