OOQP Change Log

Major Changes in OOQP 0.99.22 (March 9, 2008)

• Changed scaling of linear term in the formulation of the SVM problem by a factor of 2.

Major Changes in OOQP 0.99.19 (March 2007)

• Fixed a bug in OOQP/src/Mex/ooqp.m.

Major Changes in OOQP 0.99.16 (March 2006)

• Fixed bugs in OOQP/src/Readers/MpsReader.C and MpsReader.h related to the usage of function string_copy.
• Made changes to MpsReader.C to allow the first field (label) of BOUNDS and RHS rows to be optional.
• Updated the PETSc interface to the PETSc 2.3 API. (Thanks to Quan Nguyen for his help with this!)

Major Changes in OOQP 0.99.12 (June 2005)

• Examples in the OOQP/examples/QpGen/cinterface folder (e.g. dense_example.c and example.c) have been modified to include an equality constraint. The file Example.qps in the OOQP/examples/QpGen/sample-qps (the input data to mps.c from the OOQP/examples/QpGen/cinterface folder) has also been modified to include the equality constraint.
• An example using the Harwell Boeing format is included in hb_example.c in the OOQP/examples/QpGen/cinterface folder.

Major Changes in OOQP 0.99.11 (May 2005)

• In accordance with the ANSI C++ standards, standard header files have been included without the extension .h - for example iostream.h is now iostream, and since all classes and functions defined in standard libraries are under the std namespace, using namespace std has been used in conjunction with iostream.
• Header files that come from the C language have been prefixed with the character c - for example stdio.h is now included as cstdio.
• User defined header files have been left unchanged.

Major Changes in OOQP 0.99.10 (May 2004)

• A new option --scale has been added to the existing command-line arguments. This allows the solution of problems in which variables or equations have a vast range of values. This work was motivated by some practical problems arising in forestry management, in which the values of some data objects ranged over 25 orders of magnitude. New methods to scale the data have been added to QpGenData.c and the column scale, row scale and symmetric scale methods have been added to sparseSymMatrix.C, sparseGenMatrix.C, denseSymMatrix.C, denseGenMatrix.C.
• The input file reader (MpsReader.C) has been modified to allow a more flexible format than the standard QPS definition. The changes are as follows:
  • Code related to column-specific parsing (as defined by QPS standards) has been removed and instead, new code that tokenizes each line using space delimiters has been added. This flexible input format allows for the presence of additional spaces between fields.
  • Name records have been expanded from 8 to 16 characters in length and numbers no longer have a maximum length of 12 characters. The current version of OOQP allows for a maximum of 150 (previously 61) characters per input line to account for the increase in length of names, numbers and additional spaces.
  • An additional section for objective sense (MAX or MIN) has been allowed at the beginning of the file. If this section is not provided, it is assumed that the problem is a minimization. An example of indicator and data record for this section is provided. If used, the additional section should appear in order as the first section after the NAME section:

    NAME example.qps
    OBJSENSE 
    MAX
    

    The current version of the reader allows the user to define an optional QMATRIX section (each line of which corresponds to one nonzero coefficient of the matrix Q) following the BOUNDS section.

Major Changes in OOQP 0.99.08

• Retired the storage.C and storage.h files because the functionality in these files is better handled by instances of SimpleVector and DenseStorage.
• Updated the Petsc interface to work with either Petsc version 2.1.0 or 2.1.1.
• Version information is now available to the code in OoqpVersion.[Ch]. The qpgen executables now print the version.
• Configure works properly with f2c, and instructions on using f2c were added to the install files.
• Introduction of a Windows port

Major Changes in OOQP 0.99.07

• Introduction of the StartStrategy classes that allow programmers to set the starting point.
• Introduction of ooqp-start to allow users to experiment with starting points within matlab.
• Introduction of the print-level option in ampl the ampl interface.

Major Changes in OOQP 0.99.06

• Updated the interface to MA27 to use the new MA27 interface.
• Added a test to configure.in to make sure the old MA27 libraries are not being used.
• Added a NEWS file ;-)