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Sigma-Based PCA Clusters

Create PCA clusters from sigma bands and compare only clusters that contain points.

What's included​

Create clusters from sigma bands​

Sigma-based PCA clusters

  • Open the cluster menu in PCA -> Cluster Analysis to create ready-made Inside nσ and Outside nσ clusters without drawing a brush
  • Sigma-based clusters automatically assign matching points as soon as the PCA view finishes loading
  • The matching sigma contour adopts the cluster color so you can see the selected boundary at a glance

Compare populated clusters only​

  • Cluster comparison menus now show only clusters that currently contain points
  • If a selected cluster becomes empty or is removed, the comparison updates to the next valid populated cluster automatically

Notes​

  • Sigma-based clusters are stored with your other PCA cluster selections for that study
  • Outside nσ options are available for every displayed sigma band, while Inside nσ options are available for the inner bands
  • Empty clusters are excluded from comparison choices until they contain points