121 lines
4.6 KiB
Plaintext
121 lines
4.6 KiB
Plaintext
2010-xx-xx Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.10:
|
|
- Fixed compiling errors on Mac OS X; this patch was kindly submitted by Nic Schraudolph.
|
|
- Reduced compiling warnings on Mac OS X; this patch was kindly submitted by Tamas Nepusz.
|
|
|
|
|
|
2010-01-29 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.9:
|
|
- Fixed a mistake in checking the validity of the parameters "ftol" and "wolfe"; this mistake was discovered by Kevin S. Van Horn.
|
|
|
|
|
|
2009-07-13 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.8:
|
|
- Accepted the patch submitted by Takashi Imamichi; the backtracking method now has three criteria for choosing the step length.
|
|
- Updated the documentation to explain the above three criteria.
|
|
|
|
|
|
2009-02-28 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.7:
|
|
- Improved OWL-QN routines for stability.
|
|
- Removed the support of OWL-QN method in MoreThuente algorithm
|
|
because it accidentally fails in early stages of iterations for some
|
|
objectives. Because of this change, the OW-LQN method must be used
|
|
with the backtracking algorithm (LBFGS_LINESEARCH_BACKTRACKING), or
|
|
the library returns LBFGSERR_INVALID_LINESEARCH.
|
|
- Renamed line search algorithms as follows:
|
|
- LBFGS_LINESEARCH_BACKTRACKING: regular Wolfe condition.
|
|
- LBFGS_LINESEARCH_BACKTRACKING_LOOSE: regular Wolfe condition.
|
|
- LBFGS_LINESEARCH_BACKTRACKING_STRONG: strong Wolfe condition.
|
|
- Source code clean-up.
|
|
|
|
|
|
2008-11-02 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.6:
|
|
- Improved line-search algorithm with strong Wolfe condition, which
|
|
was contributed by Takashi Imamichi. This routine is now default for
|
|
LBFGS_LINESEARCH_BACKTRACKING. The previous line search algorithm
|
|
with regular Wolfe condition is still available as
|
|
LBFGS_LINESEARCH_BACKTRACKING_LOOSE.
|
|
- Configurable stop index for L1-norm computation. A member variable
|
|
lbfgs_parameter_t::orthantwise_end was added to specify the index
|
|
number at which the library stops computing the L1 norm of the
|
|
variables. This is useful to prevent some variables from being
|
|
regularized by the OW-LQN method.
|
|
- A sample program written in C++ (sample/sample.cpp).
|
|
|
|
|
|
2008-07-10 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.5:
|
|
- Configurable starting index for L1-norm computation. A member
|
|
variable lbfgs_parameter_t::orthantwise_start was added to specify
|
|
the index number from which the library computes the L1 norm of the
|
|
variables.
|
|
- Fixed a zero-division error when the initial variables have already
|
|
been a minimizer (reported by Takashi Imamichi). In this case, the
|
|
library returns LBFGS_ALREADY_MINIMIZED status code.
|
|
- Defined LBFGS_SUCCESS status code as zero; removed unused constants,
|
|
LBFGSFALSE and LBFGSTRUE.
|
|
- Fixed a compile error in an implicit down-cast.
|
|
|
|
|
|
2008-04-25 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.4:
|
|
- Configurable line search algorithms. A member variable
|
|
lbfgs_parameter_t::linesearch was added to choose either MoreThuente
|
|
method (LBFGS_LINESEARCH_MORETHUENTE) or backtracking algorithm
|
|
(LBFGS_LINESEARCH_BACKTRACKING).
|
|
- Fixed a bug: the previous version did not compute psuedo-gradients
|
|
properly in the line search routines for OW-LQN. This bug might quit
|
|
an iteration process too early when the OW-LQN routine was activated
|
|
(0 < lbfgs_parameter_t::orthantwise_c).
|
|
- Configure script for POSIX environments.
|
|
- SSE/SSE2 optimizations with GCC.
|
|
- New functions lbfgs_malloc and lbfgs_free to use SSE/SSE2 routines
|
|
transparently. It is uncessary to use these functions for libLBFGS
|
|
built without SSE/SSE2 routines; you can still use any memory
|
|
allocators if SSE/SSE2 routines are disabled in libLBFGS.
|
|
|
|
|
|
2007-12-16 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.3:
|
|
- An API change. An argument was added to lbfgs() function to receive
|
|
the final value of the objective function. This argument can be set
|
|
to NULL if the final value is unnecessary.
|
|
- Fixed a null-pointer bug in the sample code (reported by Takashi
|
|
Imamichi).
|
|
- Added build scripts for Microsoft Visual Studio 2005 and GCC.
|
|
- Added README file.
|
|
|
|
|
|
2007-12-13 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.2:
|
|
- Fixed a serious bug in orthant-wise L-BFGS. An important variable
|
|
was used without initialization.
|
|
- Configurable L-BFGS parameters (number of limited memories, epsilon).
|
|
|
|
|
|
2007-12-01 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.1:
|
|
- Implemented orthant-wise L-BFGS.
|
|
- Implemented lbfgs_parameter_init() function.
|
|
- Fixed several bugs.
|
|
- API documentation.
|
|
|
|
|
|
2007-09-20 Naoaki Okazaki <okazaki at chokkan org>
|
|
|
|
* libLBFGS 1.0
|
|
- Initial release.
|
|
|