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HomeHomework Helpdata-scienceCluster Analysis

Cluster Analysis

Cluster analysis is a statistical learning technique used to identify distinct groups within a dataset based on similarities and patterns in the data. It aims to ascertain whether observations fall into relatively distinct groups based on measured variables.

intermediate
3 hours
Data Science
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Overview

Cluster analysis is a powerful tool in data science that helps in grouping similar data points to uncover patterns and insights. By using various algorithms like K-means and hierarchical clustering, analysts can segment data effectively, which is crucial in fields such as marketing, image recognitio...

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Key Terms

Cluster
A group of similar data points.

Example: In customer segmentation, a cluster may represent a group of customers with similar buying habits.

K-means
A clustering algorithm that partitions data into K distinct clusters.

Example: Using K-means to segment customers into different groups based on purchasing behavior.

Dendrogram
A tree-like diagram that shows the arrangement of clusters.

Example: A dendrogram can illustrate how clusters are formed in hierarchical clustering.

Silhouette Score
A metric used to measure the quality of clusters.

Example: A high silhouette score indicates well-defined clusters.

Agglomerative Clustering
A bottom-up approach to hierarchical clustering.

Example: Starting with individual points and merging them into clusters.

Inertia
A measure of how tightly the clusters are packed.

Example: Lower inertia values indicate better clustering.

Related Topics

Principal Component Analysis
A technique for reducing the dimensionality of data while preserving variance.
intermediate
Data Visualization
The graphical representation of data to identify patterns and insights.
beginner
Machine Learning
A field of study that uses algorithms to learn from data and make predictions.
advanced

Key Concepts

Data ClusteringK-means AlgorithmHierarchical ClusteringDimensionality Reduction