This software is distributed under the GNU licence agreement by Valerio Lucarini (email: University of Camerino, Department of Mathematics and Computer Science, Camerino, Italy These programs have been tested on the MATLAB versions 6.x and 7.0 both for Linux/Unix and Microsoft Windows environments. Simple interpolation schemes can in most cases efficiently rearrange diversely spaced data to this form. These programs require that the spectral data given as input have constant frequency spacing. In order to take advantage of this set of programs, and considering that the first two programs are called by the last three programs, it is strongly advised to save them in the same directory with the following names: The fourth and the fifth program deal with the computation of Singly Subtractive Kramers-Kronig relations. It is particularly suitable when the first guess estimates of the real and imaginary part of the susceptibility have been independently obtained, e.g. The third program can be used to obtain self-consistent (in terms of Kramers-Kronig relations) estimates of the real and the imaginary part of the susceptibility when first guess estimates are used as input. The first two programs deal with the computation of K-K relations.

These programs can be easily customized by the expert user, but they nevertheless constitute useful data analysis tools also in the present form. These programs exploit novel concept derived from a theoretical physics approach. We present some basic programs written for the MATLAB environment for the analysis of optical and acoustic data and for signal processing.

Software tools for data analysis