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qforms-tk: Matlab toolbox to analyze quadratic forms


Update (3.4.2006)

It turns out that a previous version of qforms-tk was missing the routine that implements the Gram-Schmidt orthogonalization algorithm. This has been fixed in the current version!

Introduction

qforms-tk is a Matlab toolbox to analyze quadratic forms. It contains the algorithms described in

Berkes, P. and Wiskott, L. (2005).
On the analysis and interpretation of inhomogeneous quadratic forms as receptive fields.
Neural Computation, accepted.

In the toolbox you'll finda demo script that shows how to compute and visualize the optimal stimuli and the invariances of a quadratic form.

This program has been written by Pietro Berkes.

Download and Installation

The package has been tested on Matlab 7.0.0.19901 (R14).

Download qforms-tk:
.tgz (ca. 0.5 Mb): qforms_tk.tgz

To install it, simply unpack the archive into your favorite Matlab directory. This is going to create a qforms-tk directory. Before you begin to use the functions, make sure that the qforms_tk/qform directory is in your Matlab path.

Online documentation generated with m2html is available here.

Demo script

In the qforms-tk/demo directory you will find an example quadratic form and a script that shows hot to compute and visualize the optimal stimuli and the invariances.

Contact

If you find a bug or have any kind of feedback please contact me at p.berkes _AT_ biologie.hu-berlin.de.

quadratic forms project index page