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Summary of important user-visible changes for releases of the quaternion package
quaternion-2.2.0 Release Date: 2014-01-04 Release Manager: Lukas Reichlin
Changed operator semantics of "==" to match those of complex numbers and
other built-in types. Quaternion arrays are now compared element-wise.
The old behavior can be restored by the expression
bool = size_equal (a, b) && all (eq (a, b)(:))
"end" indexing for quaternions works now as expected.
** The following functions are now overloaded for quaternions:
arg isempty reshape
cast isfinite round
ceil isinf sparse
cumsum isnan squeeze
fix isreal sum
floor length tril
full ndims triu
** The following operators are now overloaded for quaternions:
ge (>=) le (<=) ne (!=, ~=)
gt (>) lt (<)
Since there is no ordering that makes quaternions an ordered field, several
definitions are possible. The ordering chosen here is the lexicographic one.
-- Allow logicals as quaternion components.
-- When called with one or three arguments, fill missing vector or scalar
part with zeros of the same class as the given arguments. Before, always
doubles were used.
quaternion-2.0.3 Release Date: 2013-10-28 Release Manager: Lukas Reichlin
** Compatibility to GNU Octave 3.8
Replaced line continuation marker "\" by "..." to avoid deprecated syntax
-- The rotation angle now lies in the interval [0, 2*pi].
-- Fixed bug #39521. (Thanks to Juan Pablo Carbajal and Max Katsev)
quaternion-2.0.2 Release Date: 2012-10-25 Release Manager: Lukas Reichlin
-- Fix typo bug which gave false positives for the k-component.
-- Avoid error if arguments are non-conformant.
Add overloaded method because the built-in function gives false positives
** ldivide, mldivide, mpower
Show error message if the number of input arguments is not 2.
quaternion-2.0.1 Release Date: 2012-10-14 Release Manager: Lukas Reichlin
Support for the inversion of quaternion matrices. Right and left division
operators (/ and \) profit from this change and support quaternion matrices
** Check number of arguments when operators are called by their function names,
e.g. plus (q1, q2, q3). Function plus supports now more than two arguments.
Revised PDF manual. There is now a function index at the end of the manual.
** The TeX-files quaternion.tex and functions.texi for generating
quaternion.pdf are included in the doc folder, next to quaternion.pdf.
Note that functions.texi is generated automatically by the scripts in the
quaternion/devel folder and the package generate_html.
They are not included in the quaternion package and can be found on the
OctaveForge SVN server.
quaternion-2.0.0 Release Date: 2012-03-28 Release Manager: Lukas Reichlin
** First official release. Its main features are:
-- Matrices and n-dimensional arrays of quaternions.
-- Overloaded operators due to the use of classes.
-- Operator semantics similar to Octave’s built-in complex numbers.
-- Vectorized code for crunching large quaternion arrays in a speedy manner.