What is the Elbow Method in K-Means?

What is the Elbow Method in K-Means?

Approach: Describe the heuristic for determining K.

A heuristic used in K-means to determine the optimal number of clusters. It involves plotting the within-cluster sum of squares (WCSS) against the number of clusters (K). The point where the rate of decrease shifts (the 'elbow') is considered the optimal K.

Follow-up: What if the elbow is not clear?

Key concepts: inertia, wcss, optimal k.