A Free Interval Arithmetic Toolbox for Matlab
The
first official version 1.0.2.004 of
b4m
is available on this site since
- 28.10.1998 for Unix systems
- 02.11.1998 for Windows systems
With the release of this version all previously released beta versions
are obsolete.
Short Description of b4m
The package b4m is a free interval arithmetic toolbox for Matlab 5.
b4m is an abbreviation of
BIAS
for
Matlab.
b4m has been tested under Matlab 5.1, Matlab 5.2 and Matlab 5.3 with Windows
and Unix Systems including
- PC running under Windows 95
- PC running under Windows 98
- PC running under Windows NT
- PC running under Suse Linux 6.0 (libc5)
- IBM RS6000 running under AIX
- Sun Sparc running under Solaris
- ...
It should be possible to use b4m on a DEC Alpha, but there exists currently
only a test version of BIAS for DEC Alpha.
b4m consists of two main parts:
- The interface to the Basic Interval Arithmetic
Subroutines by Olaf Knüppel (commonly known as BIAS).
- A collection of M-Files which either work on these
routines or implement small programs.
In the nearest future there will be a complete documentation available in
Since 19.3.1999 documentation in
is available.
Sample Output of b4m
This small example shows (hopefully) some of the features of b4m.
It has been generated using the code fragment
A = interval(rand(10));
b = A*ones(10,1);
x = A\b
and afterwards taking a picture.
FAQ's, Bugs, Questions and Remarks
Prerequisites for b4m are Matlab 5 and BIAS. The Windows version comes with
precompiled Mex-files (dll's), so there is no explicit need for BIAS.
It is possible to raise the speed of the Windows version by recompiling
the Mex-files (this needs BIAS).
Installation - A Quick Reference
In order to install b4m on a
Unix Workstation or Linux PC
there are three simple steps to perform.
- Download the
b4m version for Unix,
uncompress the package e.g. in the directory
/usr/local/matlab/toolbox/.
- Compile all files (bias_*.c) in the directories
/usr/local/matlab/toolbox/b4m/private/ and
/usr/local/matlab/toolbox/b4m/@interval/private/
using the appropriate Makefiles.
- Add the directory
/usr/local/matlab/toolbox/b4m/
to the Matlab searchpath.
For the second step you need a compiled version of BIAS.
For Windows 95/98/NT the package is available with
precompiled Mex-files (dll's), so the installation process is much easier.
- Download the
b4m version for Windows 95/98/NT
and uncompress the package in the directory
C:\Matlab\Toolbox\.
- Add the directory
C:\Matlab\Toolbox\b4m\
to your path.
The Matlab directory might be somewhere else on your system, in that case
simply modify the statements above to fit your system.
Download b4m
Comments and Credits
A new BIAS building upon BLAS is on the way ;-).
Jens Zemke zemke∂tu-harburg.de
TU Hamburg - Harburg
Schwarzenbergstr. 95