Matlab files for artificial neural networks described in "Regularization tools for training large feed-forward neural networks using Automatic Differentiation" by J. Eriksson, M. Gulliksson, P. Lindstrom and P_A. Wedin published in The Journal of Optimization, Methods and Software, vol. 10, pp 1-63.These files can be downloaded using some browser at URL-addressftp://ftp.cs.umu.se/pub/users/perl/ and retrieve ANN_Matlab.tar.gzThe files should be unpacked bygunzip ANN_Matlab.tar.gztar -xf ANN_Matlab.tar(or using onlygtar -zxvf ANN_Matlab.tar.gz)That should give you a directory ANN_Matlab with the files included.Start by reading the "documentation" in the file "trainltr.m" or "traintr.m"Remember: Anything that comes free has no guarantee.