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// Copyright (C) 2003--2004 Zbigniew Leyk (zbigniew.leyk@anu.edu.au)
// and David E. Stewart (david.stewart@anu.edu.au)
// and Ronan Collobert (collober@idiap.ch)
//
// This file is part of Torch 3.1.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef MAT_OPERATIONS_INC
#define MAT_OPERATIONS_INC
#include "Mat.h"
#include "Vec.h"
namespace Torch {
/** Collection of matrix operation functions.
Based on the "Meschach Library", available at the
anonymous ftp site thrain.anu.edu.au in the directory
pub/meschach.
@author David E. Stewart (david.stewart@anu.edu.au)
@author Zbigniew Leyk (zbigniew.leyk@anu.edu.au)
@author Ronan Collobert (collober@idiap.ch)
*/
//@{
/// Matrix addition -- may be in-situ
void mxMatAddMat(Mat * mat1, Mat * mat2, Mat * out);
/// Matrix subtraction -- may be in-situ
void mxMatSubMat(Mat * mat1, Mat * mat2, Mat * out);
/// Matrix-matrix multiplication
void mxMatMulMat(Mat * mat1, Mat * mat2, Mat * out);
/** Matrix-matrix transposed multiplication.
-- #A.B^T# is stored in out */
void mxMatMulTrMat(Mat * mat1, Mat * mat2, Mat * out);
/** Matrix transposed-matrix multiplication.
-- #A^T.B# is stored in out */
void mxTrMatMulMat(Mat * mat1, Mat * mat2, Mat * out);
/** Matrix-vector multiplication.
-- Note: #b# is treated as a column vector */
void mxMatMulVec(Mat * mat, Vec * b, Vec * out);
/// Scalar-matrix multiply -- may be in-situ
void mxRealMulMat(real scalar, Mat * matrix, Mat * out);
/** Vector-matrix multiplication.
-- Note: #b# is treated as a row vector */
void mxVecMulMat(Vec * b, Mat * mat, Vec * out);
/// Transpose matrix
void mxTrMat(Mat * in, Mat * out);
/** Swaps rows i and j of matrix A upto column lim.
#lo# and #hi# to -1 if you want to swap all */
void mxSwapRowsMat(Mat * mat, int i, int j, int lo, int hi);
/** Swap columns i and j of matrix A upto row lim.
#lo# and #hi# to -1 if you want to swap all */
void mxSwapColsMat(Mat * mat, int i, int j, int lo, int hi);
/** Matrix-scalar multiply and add.
-- may be in situ.
-- returns out == A1 + s*A2 */
void mxMatAddRealMulMat(Mat * mat1, Mat * mat2, real s, Mat * out);
/** Matrix-vector multiply and add.
-- may not be in situ
-- returns out == v1 + alpha*A*v2 */
void mxVecAddRealMulMatMulVec(Vec * v1, real alpha, Mat * mat, Vec * v2,
Vec * out);
/** Vector-matrix multiply and add
-- may not be in situ
-- returns out' == v1' + alpha * v2'*A */
void mxVecAddRealMulVecMulMat(Vec * v1, real alpha, Vec * v2, Mat * mat,
Vec * out);
//@}
}
#endif
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