matrix_utilities.hpp

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// ========================================================================== //
//                         LINEAR ALGEBRA PACKAGE                             //
//                                                                            //
// Functions for basic linear algebra computations.                           //
// ========================================================================== //
// INFO                                                                       //
// ========================================================================== //
// Author            : Alessandro Alaia                                       //
// Data              : Sept 26, 2014                                          //
// Version           : v2.0                                                   //
//                                                                            //
// All rights reserved.                                                       //
// ========================================================================== //
# ifndef __BITPIT_MATRIX_UTILITIES_HPP__
# define __BITPIT_MATRIX_UTILITIES_HPP__
 
// ========================================================================== //
// INCLUDES                                                                   //
// ========================================================================== //
 
// Standard template library
# include <vector>
# include <cassert>
# include <cmath>
# include <array>
# include <iostream>
 
# include "bitpit_operators.hpp"
 
namespace bitpit{

namespace linearalgebra{
 
// Generic routines --------------------------------------------------------- //
template <class T>
void display(                                                          // Display matrix in nicely formatted output
    std::ostream                                &,                            // (input/output) handle to output stream
    std::vector< std::vector< T > >             &                             // (input) matrix to be displayed
); 
 
template <class T, size_t m, size_t n>
void display(                                                          // Display matrix in nicely formatted output
    std::ostream                                &,                            // (input/output) handle to output stream
    std::array< std::array< T, n >, m >         &                             // (input) matrix to be displayed
);
 
template <class T>
void displayColMajor(                                                         // Display matrix in nicely formatted output
    std::ostream                                &out,                         // (input/output) handle to output stream
    T                                           *A,                           // (input) matrix to be displayed
    int                                         nRows,                        // (input) number of rows
    int                                         nCols                         // (input) number of columns
);
 
template <class T>
void displayRowMajor(                                                         // Display matrix in nicely formatted output
    std::ostream                                &out,                         // (input/output) handle to output stream
    T                                           *A,                           // (input) matrix to be displayed
    int                                         nRows,                        // (input) number of rows
    int                                         nCols                         // (input) number of columns
);
 
template <class T>
void displayColMajorSymmetric(                                                // Display matrix in nicely formatted output
    std::ostream                                &out,                         // (input/output) handle to output stream
    T                                           *A,                           // (input) matrix to be displayed
    int                                         nRows,                        // (input) number of rows
    int                                         nCols,                        // (input) number of columns
    char                                        uplo                          // (input) upper or lower portion of the matrix
);
 
template <class T>
void displayRowMajorSymmetric(                                                // Display matrix in nicely formatted output
    std::ostream                                &out,                         // (input/output) handle to output stream
    T                                           *A,                           // (input) matrix to be displayed
    int                                         nRows,                        // (input) number of rows
    int                                         nCols,                        // (input) number of columns
    char                                        uplo                          // (input) upper or lower portion of the matrix
);
 
// Auxiliary routines --------------------------------------------------------- //
template <class T>
void complement(                                                              // Complement extraction
    int                                          ,                            // (input) complement 1st index
    int                                          ,                            // (input) complement 2nd index
    std::vector< std::vector< T > >             &,                            // (input) input matrix
    std::vector< std::vector< T > >             &                             // (input/output) (i,j) complement
);
 
template <class T, size_t m, size_t n>
void complement(                                                              // Complement extraction
    int                                          ,                            // (input) complement 1st index
    int                                          ,                            // (input) complement 2nd index
    std::array< std::array< T, n >, m >         &,                            // (input) input matrix
    std::array< std::array<T, n-1>, m-1>        &                             // (input/output) (i,j) complement
);
 
int linearIndexColMajor(
    int                                         row,                          // (input) row
    int                                         col,                          // (input) column
    int                                         nRows,                        // (input) number of rows
    int                                         nCols                         // (input) number of columns
);
 
int linearIndexRowMajor(
    int                                         row,                          // (input) row
    int                                         col,                          // (input) column
    int                                         nRows,                        // (input) number of rows
    int                                         nCols                         // (input) number of columns
);
 
int linearIndexColMajorSymmetric(
    int                                         row,                          // (input) row
    int                                         col,                          // (input) column
    int                                         nRows,                        // (input) number of rows
    int                                         nCols,                        // (input) number of columns
    char                                        uplo                          // (input) upper or lower portion of the matrix
 
);
 
int linearIndexRowMajorSymmetric(
    int                                         row,                          // (input) row
    int                                         col,                          // (input) column
    int                                         nRows,                        // (input) number of rows
    int                                         nCols,                        // (input) number of columns
    char                                        uplo                          // (input) upper or lower portion of the matrix
);
 
// Matrix Basic templates --------------------------------------------------- //
template <class T>
void zeros(                                                                   // Initialize an m-by-n matrix of zeros
    std::vector< std::vector < T > >            &,                            // (input/output) matrix
    int                                          ,                            // (input) number of rows
    int                                                                       // (input) number of columns
);
 
template <class T, size_t m, size_t n>
void zeros(                                                                   // Initialize an m-by-n matrix of zeros
    std::array< std::array < T, n >, m >        &                             // (input/output) matrix
);
 
template <class T>
void ones(                                                                    // Initialize an m-by-n matrix of ones
    std::vector< std::vector < T > >            &,                            // (input/output) matrix
    int                                          ,                            // (input) number of rows
    int                                                                       // (input) number of columns
);
 
template <class T, size_t m, size_t n>
void ones(                                                                    // Initialize an m-by-n matrix of ones
    std::array< std::array < T, n >, m >        &                             // (input/output) matrix
);
 
template <class T>
void eye(                                                                     // Initialize and m-by-n identity matrix
    std::vector< std::vector < T > >            &,                            // (input/output) matrix
    int                                          ,                            // (input) number of rows
    int                                                                       // (input) number of columns
);
 
template <class T, size_t m, size_t n>
void eye(                                                                     // Initialize and m-by-n identity matrix
    std::array< std::array < T, n >, m >        &                             // (input/output) matrix
);
 
// Matrix determinant ------------------------------------------------------- //
template <class T>
T det(                                                                        // Matrix determinant
    std::vector< std::vector< T > >             &                             // (input) input matrix
);
 
template <class T>
T det(                                                                        // Dummy function for recursive calls to det()
    std::array< std::array < T, 1 >, 1 >        &                             // (input) input matrix
);
 
template <class T, size_t m, size_t n>
T det(                                                                        // Matrix determinant
    std::array< std::array < T, n >, m >        &                             // (input) input matrix
);
 
}
 
}
 
// =================================================================================== //
// TEMPLATES                                                                           //
// =================================================================================== //
# include "matrix_utilities.tpp"
 
# endif