The screenshot in Figure 2 shows a demo C# program that uses the k-means algorithm to cluster the data. [Click on image for larger view.] Figure 1. Raw Data to Cluster [Click on image for larger view.

The k-means clustering algorithm minimizes a metric called the within-cluster sum of squares, which will be explained shortly. [Click on image for larger view.] Figure 2: K-Means Demo Data Before and ...