CAR: A MATLAB Package to Compute Correspondence Analysis with Rotations

• Main Authors: Urbano Lorenzo-Seva Rovira, Michel van de Velden, Henk A. L. Kiers
• Format: Article
• Language: English
• Published: Foundation for Open Access Statistics 2009-09-01
• Series: Journal of Statistical Software
• Subjects: correspondence analysis; biplot; orthogonal rotation; oblique rotation; simple structure; MATLAB
• Online Access: http://www.jstatsoft.org/v31/i08/paper

Correspondence analysis (CA) is a popular method that can be used to analyse relationships between categorical variables. Like principal component analysis, CA solutions can be rotated both orthogonally and obliquely to simple structure without affecting the total amount of explained inertia. We describe a <b>MATLAB</b> package for computing CA. The package includes orthogonal and oblique rotation of axes. It is designed not only for advanced users of <b>MATLAB</b> but also for beginners. Analysis can be done using a user-friendly interface, or by using command lines. We illustrate the use of <b>CAR</b> with one example.