Teuchos - Trilinos Tools Package Version of the Day
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LAPACK/cxx_main.cpp

This is an example of how to use the Teuchos::LAPACK class.

/*
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// Teuchos: Common Tools Package
// Copyright (2004) Sandia Corporation
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// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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#include "Teuchos_Version.hpp"
int main(int argc, char* argv[])
{
std::cout << Teuchos::Teuchos_Version() << std::endl << std::endl;
// Creating an instance of the LAPACK class for double-precision routines looks like:
// This instance provides the access to all the LAPACK routines.
My_Matrix.random();
My_Vector.random();
// Perform an LU factorization of this matrix.
int ipiv[4], info;
char TRANS = 'N';
lapack.GETRF( 4, 4, My_Matrix.values(), My_Matrix.stride(), ipiv, &info );
// Solve the linear system.
lapack.GETRS( TRANS, 4, 1, My_Matrix.values(), My_Matrix.stride(),
ipiv, My_Vector.values(), My_Vector.stride(), &info );
// Print out the solution.
std::cout << printMat(My_Vector) << std::endl;
return 0;
}
Templated interface class to LAPACK routines.
Templated serial dense matrix class.
Templated serial dense vector class.
The Templated LAPACK Wrapper Class.
void GETRF(const OrdinalType &m, const OrdinalType &n, ScalarType *A, const OrdinalType &lda, OrdinalType *IPIV, OrdinalType *info) const
Computes an LU factorization of a general m by n matrix A using partial pivoting with row interchange...
void GETRS(const char &TRANS, const OrdinalType &n, const OrdinalType &nrhs, const ScalarType *A, const OrdinalType &lda, const OrdinalType *IPIV, ScalarType *B, const OrdinalType &ldb, OrdinalType *info) const
Solves a system of linear equations A*X=B or A'*X=B with a general n by n matrix A using the LU facto...
This class creates and provides basic support for dense rectangular matrix of templated type.
OrdinalType stride() const
Returns the stride between the columns of this matrix in memory.
int random()
Set all values in the matrix to be random numbers.
ScalarType * values() const
Data array access method.
This class creates and provides basic support for dense vectors of templated type as a specialization...