# Glossary:RF matrix

Revision as of 19:32, 3 April 2016 by SuperMemoHelp (talk | contribs)

**RF matrix** - a matrix that holds all R-Factor values, both measured and theoretical (i.e. those that could not be measured yet). R-Factors are arranged in rows of repetition category (i.e. the measure of memory stability) and columns of A-Factor (i.e. the measure of item difficulty). You can see your **RF matrix** with **Tools : Statistics : Analysis : Matrices : RF matrix**.