Enhanced Statistical Features in SPAYN Version 1.7.2

Introduction

When performing statistical analyses it is often necessary to compute transformations of the observed data. This transformation may only involve a single parameter, or it may be a complicated function of several different variables. SPAYN has a new feature for generating user-defined parameters as functions of existing variables and/or constants.

A new Factor plot option allows the user to plot the percentage of explained variation versus the number of factors, for a given Principal Components or Factor Analysis. It is extremely useful to have a graphical representation of the contribution each factor makes to explaining the variance in the original data. In particular when deciding how many independent factors to utilize in further calculations.