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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkVariableSizeMatrix.txx,v $
Language: C++
Date: $Date: 2007-11-09 13:49:16 $
Version: $Revision: 1.8 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkVariableSizeMatrix_txx
#define __itkVariableSizeMatrix_txx
#include "itkVariableSizeMatrix.h"
#include "itkNumericTraits.h"
namespace itk
{
template<class T>
VariableSizeMatrix<T>
::VariableSizeMatrix(unsigned int rows, unsigned int cols)
: m_Matrix(rows,cols) {}
/**
* Product by a Vector
*/
template<class T>
Array<T>
VariableSizeMatrix<T>
::operator*( const Array<T> & vect ) const
{
unsigned int rows = this->Rows();
unsigned int cols = this->Cols();
if( vect.Size() != cols )
{
itkGenericExceptionMacro( << "Matrix with " << this->Cols() << " columns cannot be "
<< "multiplied with array of length: " << vect.Size() );
}
Array<T> result(rows);
for( unsigned int r=0; r<rows; r++)
{
T sum = NumericTraits<T>::Zero;
for( unsigned int c=0; c< cols; c++ )
{
sum += m_Matrix(r,c) * vect[c];
}
result[r] = sum;
}
return result;
}
/**
* Product by a matrix
*/
template<class T >
VariableSizeMatrix<T>
VariableSizeMatrix<T>
::operator*( const Self & matrix ) const
{
if (this->Cols() != matrix.Rows())
{
itkGenericExceptionMacro( << "Matrix with size ("
<< this->Rows() << ","
<< this->Cols()
<< ") cannot be multiplied by matrix with size ("
<< matrix.Rows() << "," << matrix.Cols() << ")");
}
Self result;
result = m_Matrix * matrix.m_Matrix;
return result;
}
/**
* Matrix Addition
*/
template<class T >
VariableSizeMatrix<T>
VariableSizeMatrix<T>
::operator+( const Self & matrix ) const
{
if( (matrix.Rows() != this->Rows()) ||
(matrix.Cols() != this->Cols()))
{
itkGenericExceptionMacro( << "Matrix with size (" << matrix.Rows() << "," <<
matrix.Cols() << ") cannot be added to a matrix with size (" <<
this->Rows() << "," << this->Cols() << ")");
}
Self result(this->Rows(),this->Cols());
for( unsigned int r=0; r< this->Rows(); r++)
{
for( unsigned int c=0; c< this->Cols(); c++ )
{
result.m_Matrix(r,c) = m_Matrix(r,c) + matrix.m_Matrix(r,c);
}
}
return result;
}
/**
* Matrix Addition in-place
*/
template<class T>
const VariableSizeMatrix<T> &
VariableSizeMatrix<T>
::operator+=( const Self & matrix )
{
if( (matrix.Rows() != this->Rows()) ||
(matrix.Cols() != this->Cols()))
{
itkGenericExceptionMacro( << "Matrix with size (" << matrix.Rows() << "," <<
matrix.Cols() << ") cannot be added to a matrix with size (" <<
this->Rows() << "," << this->Cols() << ")");
}
for( unsigned int r=0; r<this->Rows(); r++)
{
for( unsigned int c=0; c<this->Cols(); c++ )
{
m_Matrix(r,c) += matrix.m_Matrix(r,c);
}
}
return *this;
}
/**
* Matrix Subtraction
*/
template<class T>
VariableSizeMatrix<T>
VariableSizeMatrix<T>
::operator-( const Self & matrix ) const
{
if( (matrix.Rows() != this->Rows()) ||
(matrix.Cols() != this->Cols()))
{
itkGenericExceptionMacro( << "Matrix with size (" << matrix.Rows() << "," <<
matrix.Cols() << ") cannot be subtracted from matrix with size (" <<
this->Rows() << "," << this->Cols() << ")");
}
Self result(this->Rows(),this->Cols());
for( unsigned int r=0; r<this->Rows(); r++)
{
for( unsigned int c=0; c<this->Cols(); c++ )
{
result.m_Matrix(r,c) = m_Matrix(r,c) - matrix.m_Matrix(r,c);
}
}
return result;
}
/**
* Matrix subtraction in-place
*/
template<class T>
const VariableSizeMatrix<T> &
VariableSizeMatrix<T>
::operator-=( const Self & matrix )
{
if( (matrix.Rows() != this->Rows()) ||
(matrix.Cols() != this->Cols()))
{
itkGenericExceptionMacro( << "Matrix with size (" << matrix.Rows() << "," <<
matrix.Cols() << ") cannot be subtracted from matrix with size (" <<
this->Rows() << "," << this->Cols() << ")");
}
for( unsigned int r=0; r<this->Rows(); r++)
{
for( unsigned int c=0; c<this->Cols(); c++ )
{
m_Matrix(r,c) -= matrix.m_Matrix(r,c);
}
}
return *this;
}
template<class T>
VariableSizeMatrix<T> &
VariableSizeMatrix<T>
::operator- ()
{
for( unsigned int r=0; r<this->Rows(); r++)
{
for( unsigned int c=0; c<this->Cols(); c++ )
{
m_Matrix(r,c) = -m_Matrix(r,c);
}
}
return *this;
}
/**
* Product by a vnl_matrix
*/
template<class T>
vnl_matrix<T>
VariableSizeMatrix<T>
::operator*( const vnl_matrix<T> & matrix ) const
{
return m_Matrix * matrix;
}
/**
* Product by a matrix
*/
template<class T>
void
VariableSizeMatrix<T>
::operator*=( const Self & matrix )
{
m_Matrix *= matrix.m_Matrix;
}
/**
* Product by a vnl_matrix
*/
template<class T>
void
VariableSizeMatrix<T>
::operator*=( const vnl_matrix<T> & matrix )
{
m_Matrix *= matrix;
}
/**
* Product by a vnl_vector
*/
template<class T>
vnl_vector<T>
VariableSizeMatrix<T>
::operator*( const vnl_vector<T> & vc ) const
{
return m_Matrix * vc;
}
} // end namespace itk
#endif
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