User`s guide

2 MATLAB 6.1 Release Notes
2-18
Major Bug Fixes
MATLAB 6.1 includes several bug fixes made since MATLAB 6.0. This section
describes the particularly important bug fixes.
Also, MATLAB 6.1 includes several important MATLAB 6.0 bug fixes.
Development Environment
Help Browser Supports Mouse Wheel
For Windows platforms, the wheel on your mouse will now work in the Help
browser.
UNIX Help Browser Search Results Now Highlighted
On UNIX systems, when you perform a full text search using the Help browser,
the search terms are highlighted when you view a page.
UNIX Paste Problems Fixed
On some UNIX systems, pasting after a cut or copy would sometimes cause the
system to hang. That problem has been fixed. However, due to issues with
UNIX itself, the paste does not always work and you might have to do it again.
Mathematics
Memory Leak Fixed in Matrix Multiply
Under certain conditions, matrix multiply (which includes matrix-vector
multiply, vector-matrix multiply, and even vector inner products) leaked
memory. For example, on a Pentium III under Linux or Windows, any vector
inner product of length greater than 15,000 leaked memory. This was observed
by MATLAB increasing its use of system resources that were never returned.
MATLAB 6.1 uses new ATLAS BLAS libraries that no longer leak memory.
Improved Convergence for eigs(A,k,'sm') and eigs(A,k,0)
In MATLAB 6.0, eigs was reimplemented to use the ARPACK library of
routines. Unfortunately, the smallest magnitude case,
sigma = 'sm' and
sigma = 0, chose the wrong algorithm. For MATLAB 6.1, the correct ARPACK
algorithm is used and convergence is much quicker.