A scatter plot. The horizontal axis shows principal component number, labelled 1 to 14. The vertical axis shows eigenvalue, labelled 0 to 5. Points are shown for each integer component number. Component 1 has eigenvalue about 5.0, component 2 has eigenvalue about 1.6, component 3 has eigenvalue about 1.3, component 4 has eigenvalue about 1.1, then the eigenvalues fall steadily until component 14 has eigenvalue about 0.3. A straight line has been drawn on the plot. The line goes from about principal component = 1, eigenvalue = 1.1, to principal component = 14, eigenvalue = 0.2. The points from eigenvalue = 4 lie along this line.

Back to Measurement in Health and Disease: Composite scales and scores.

This page maintained by Martin Bland.

Last updated: 20 May, 2008.