+A Principal Direction signifies the axis of greatest variance or influence within a system or dataset. It reveals the most impactful orientation where data points spread, often discovered through [Eigenvalue](/wiki/eigenvalue) analysis. This core direction simplifies complex [Data](/wiki/data), offering an essential summary of its structure.
+## See also
+- [Principal Component Analysis](/wiki/principal_component_analysis)
+- [Vector](/wiki/vector)
+- [Linear Algebra](/wiki/linear_algebra)
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