Use and copying of this software and preparation of derivative works based upon this software are permitted. However, any distribution of this software or derivative works must include the above copyright notice. This software is made available AS IS, and neither the Electronics Research Laboratory or the University of California make any warranty about the software, its performance or its conformity to any specification. Animation and differentiation routines were added by Paul Walker, NCSA and UIUC Dept of Physics. The following copyright and disclaimer applies to these parts of the code only. UNIVERSITY OF ILLINOIS (UI), NATIONAL CENTER FOR SUPERCOMPUTING APPLICATIONS (NCSA), Software Distribution Policy for Copyrighted Software The above mentioned modifications to XGraph made with the authors consent are copyrighted, but available without fee for education, academic research and non-commercial purposes. The modifications are copyrighted in the name of the UI, and ownership of the modifications remains with the UI. Users may distribute the binary and source code to third parties provided that the copyright notice and this statement appears on all copies and that no charge is made for such copies. Any entity wishing to integrate all or part of the source code into a product for commercial use or resale, should contact the University of Illinois, c/o NCSA, to negotiate an appropriate license for such commercial use. UI MAKES NO REPRESENTATIONS ABOUT THE SUITABILITY OF THE SOFTWARE FOR ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY. THE UI SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY THE USER OF THIS SOFTWARE. The software may have been developed under agreements between the UI and the Federal Government which entitle the Government to certain rights. By copying this program, you, the user, agree to abide by the copyright conditions and understandings with respect to any software which is marked with a copyright notice.