A Discriminant Analysis Procedure for Paired Variables
Chan F. Lam, Michael A. A. Cox · Technometrics · 1981
The widely used stepwise discriminant analysis procedure selects one variable at a time. However, instances occur in which variables occur naturally paired, such as the real and imaginary parts of a Fourier transformed signal. The existing stepwise discriminant procedure selects variables one at a time and might select the real part of the ith harmonic and the imaginary part of the jth harmonic, This paper presents an algorithm that selects variables in pairs.