Download page: http://sourceforge.net/project/showfiles.php?group_id=99696
LAPACK++ is a library for high performance linear algebra computations. This version includes support for solving linear systems using LU, Cholesky, QR matrix factorizations, and symmetric eigenvalue problems.
You can create objects of that type by the constructors, or by the static constructors for elementary matrices (e.g. LaGenMatDouble::zeros), or by the template functions in latmpl.h .
Then you will probably want to use matrix-vector operations from the BLAS library. These can be found in the files blas1pp.h , blas2pp.h , and blas3pp.h (e.g. Blas_Mat_Mat_Trans_Mult).
And finally functions for solving equation systems can be found in laslv.h . SVN decomposition in lasvd.h . QR decomposition in LaGenQRFactComplex .
Note: To switch on the support for complex-valued matrices, you need to define the macro
LA_COMPLEX_SUPPORT in your application.
If you have compiled LAPACK++ on another platform successfully, then the maintainer would be glad to hear about that.
Some similar functionality as in LAPACK++ is offered by the library IT++, see http://itpp.sourceforge.net/ , but one important high-performance feature missing in IT++ is the ability to create "submatrix views" and "shallow copies" of matrices, i.e. pass submatrices by reference instead of by value.
For compiling on Windows with the Microsoft Visual Studio C++ (MSVC) compiler:
1. Install the .exe setup package because it contains the auxiliary libraries LIBBLAS32.LIB and others. The linker library LIBBLAS32.LIB and LIBLAPACK32.Lib is installed into c:\Program-Files\Lapackpp\lib\ whereas the corresponding LIBBLAS32.DLL and LIBLAPACK32.DLL are installed into your Windows system directory, e.g. c:\WINNT. These files are unchanged since years, so you can safely use these four files from an earlier release of lapackpp to compile a newer release from source code.
2. Unpack the tar.gz package with the source code, and
3. compile the source code using the provided
lapackpp.vcproj MSVC project file, which will also compile two small test programs. You might have to adapt the linker input directories (Project Properties -> Linker -> Input) so that the LIBBLAS32.LIB linker library can be found in c:\Program-Files\Lapackpp\lib\.
4. After successfully compiling the DLL, you need to copy the LAPACKPP.DLL file to whatever location you consider appropriate. This can either be your c:\WINNT directory, or the working directory of your actual application that should use lapackpp.
Note: This has been tested only with MSVC 7.1. In older MSVC versions, lapackpp probably doesn't compile anymore. This might be due to problems with the data types for complex-valued matrices, and in that case you can try to compile the real-valued matrices only by using the included project file lapackpp-onlyreal.vcproj.
For compiling on windows with gcc/mingw32 compiler, see README.WIN32.
./autogen.shand continue with compilation after that.
For compilation, run the following commands:
./configure --prefix=/your/install/path make make install
./configure --help to see more information. After successful compilation, you can run various test programs by the command "make check".
doxygentool for this auto-generated HTML documentation, see e.g. LaGenMatComplex, Blas_Add_Mult, Blas_Mat_Vec_Mult, Blas_Mat_Mat_Mult, LaLinearSolveIP, or LaSVD_IP.
Documentation for the underlying LAPACK (without the '++') package can be found on http://www.netlib.org/lapack and a search engine is on http://www.cs.colorado.edu/~lapack , but please keep in mind that these are only the underlying libraries, not Lapack++ itself.
LAPACK routines in turn are written so that as much as possible of the computation is performed by calls to the Basic Linear Algebra Subprograms (BLAS). Information about BLAS can be found on http://www.netlib.org/blas and http://www.cs.colorado.edu/~lapack/aboutBlas.html , but please keep in mind that these are only the underlying libraries, not Lapack++ itself.
There is some old, outdated information about the original LAPACK++-1.1 in the LAPACK++ User's Manual and Class Reference Manual, all available from http://www.netlib.org/ or on http://math.nist.gov/lapack++/ , but please keep in mind that this is old and outdated!
To use it in your program, you need to specify the location of the header files by the compiler argument
-I (for gcc), the location of the shared library by the compiler argument
-L and the library itself by
-llapackpp . All of these arguments can be obtained from the pkg-config helper program, see "man pkg-config". A linker command might look like this:
gcc `pkg-config lapackpp --libs` foo.o
If your application uses autoconf/automake, these compiler arguments can alternatively be obtained from the
ACX_LAPACKPP macro from
macros/acx_lapackpp.m4. A linker command might look like this:
gcc -L/usr/local/lib -llapackpp foo.o
To switch on the support for complex-valued matrices, you need to define the macro
LA_COMPLEX_SUPPORT in the source code of your application.
http://sourceforge.net/projects/lpp/ Recently started; only low-level classes
However, they abandoned LAPACK in the year 2000 and stated: "Lapack++ is no longer actively supported. The successor to this project is that Template Numerical Toolkit (TNT), see http://math.nist.gov/tnt for details." Unfortunately, the project TNT never really took off.
Therefore this fork from the original LAPACK++ has been started. There are a whole number of changes now in here. Most notably, this local copy has complex matrices enabled again by adding a custom copy of stdc++'s complex type (see include/lacomplex.h and include/lacomplex).
Along these lines, wrapper functions for more and more LAPACK and BLAS routines have been added. Also, this includes fixes in various wrong default arguments.
2004-01-14, Christian Stimming <email@example.com>