Matlab Routines                        for                  Subset Selection                        and                  Ridge Regression                        in               Linear Neural Networks                    Version 1.013                   February 25, 1997The subdirectories below contain Matlab code and a postscriptmanual document for various algorithms to do with supervisedlearning using linear networks, particularly radial basis functionnetworks. There is also Matlab code to re-run the examples givenin the manual.If you start Matlab in this directory (so it reads ./startup.m)you will be able to run the example programs, e.g.  forwardSelectExampl.m  globalRidgeExample.m  localRidgeExample.m.You may wish to incorporate parts of ./startup.m in your mainstartup.m file in $MATLABPATH (see the comments in ./startup.m).A brief description of the contents of each subdirectory follows.For further details see the ReadMe files in the subdirectories.Manual/  The postscript document manual.ps.RadialBasisFunctions/  rbfDesign.m for creating the design matrices of radial  basis function networks given the basis function type,  the centre positions, the centre sizes and the training  set inputs.RidgeRegression/  globalRidge.m for optimising a single regularisation  parameter given a design matrix and the training outputs.  The example program globalRidgeExample.m.  localRidge.m for optimising multiple regularisation  parameters given a design matrix and the training outputs.  The example program localRidgeExample.m.  predictError.m for calculating various types of errors  (e.g. GCV) given a design, the training outputs and a  choice for the regularisation parameter(s).  The example program predictErrorExample.m.SubsetSelection/  forwardSelect.m for forward selecting a subset given a  selection set design, the training outputs and various  options for controlling the search and regularisation.  The example program forwardSelectExampl.m.Tutorial/  introExample.m to run the example given in the Tutorial  Introduction section of the manual.Utilities/  Some useful little subroutines.Archive/  Version history.-----------------------------------------------------------------Mark J L Orr, Centre for Cognitive Science, Edinburgh Universitymark@cns.ed.ac.uk  http://www.cns.ed.ac.uk/people/mark.html