FPL Statistics Group

Quadrature (Numerical Integration) Java Package

Currently (as 2/12/03) this package contains only an unofficial Java translation of the public domain 1-dimensional numerical integration routine Gaus8. Gaus8 was written by R.E. Jones. It is part of the SLATEC library of public domain numerical analysis routines. A FORTRAN version of Gaus8 can be found by doing a search at www.netlib.org.

Warning!!!

This translation was performed by a user of numerical analysis routines rather than a developer. When numerical integration routines written in Java by professional numerical analysts become available, they should be used.
I have tried to be careful with the coding and have done some simple testing (see the Gaus8Test application). However, it is quite possible that I have introduced errors into the routine in the course of the translation. If you detect bugs in Gaus8, PLEASE contact me (Steve Verrill at sverrill@fs.fed.us or 608-231-9375).

DISCLAIMER OF WARRANTIES

THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. THE AUTHOR/TRANSLATOR DOES NOT WARRANT, GUARANTEE OR MAKE ANY REPRESENTATIONS REGARDING THE SOFTWARE OR DOCUMENTATION IN TERMS OF THEIR CORRECTNESS, RELIABILITY, CURRENTNESS, OR OTHERWISE. THE ENTIRE RISK AS TO THE RESULTS AND PERFORMANCE OF THE SOFTWARE IS ASSUMED BY YOU. IN NO CASE WILL ANY PARTY INVOLVED WITH THE CREATION OR DISTRIBUTION OF THE SOFTWARE BE LIABLE FOR ANY DAMAGE THAT MAY RESULT FROM THE USE OF THIS SOFTWARE.

Sorry about that.

Documentation

Here is the documentation generated by javadoc. Also see the source code of Gaus8.java.

Installation

The code is available in compressed tar, Windows 95 zip, and Windows 98 and later zip form. Alternatively, the code comes in four files:

Given the manner in which the routines are currently written, you will need to import them (see the beginning of Gaus8Test.java). All of the classes will have to be placed in subdirectories of a directory in your CLASSPATH. For the quadrature classes, this subdirectory will have to be called quadrature. Console.class will have to be placed in a subdirectory called corejava.

Note that if you install the software in this manner, then to run, for example, Gaus8Test you will have to issue the command:

java quadrature.Gaus8Test

Alternatively, you could remove the package and import statements (other than import java.lang.*) in the source code, and compile all of the necessary files in the same directory.

To run Gaus8 you will need to write a driver class such as Gaus8Test that implements the Gaus8_fcn interface. This class will have to include an f_to_integrate method.

Console.java

Console.java is software described in Cornell and Horstmann's Core Java (SunSoft Press/Prentice-Hall). (I like this book.) It may be used for non-commerical purposes. I only make use of it in the testing routines.

Support

If you have questions about this software, or suggestions for improvement, please contact me at sverrill@fs.fed.us or 608-231-9375.

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Last modified on 2/12/03.

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