/usr/include/ITK-4.12/linalg/lsqrDense.h is in libinsighttoolkit4-dev 4.12.2-dfsg1-1ubuntu1.
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*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef LSQR_lsqrDense_h
#define LSQR_lsqrDense_h
#include "lsqrBase.h"
/** \class lsqrDense
*
* Specific implementation of the solver for a type of dense Matrix.
*
*/
class lsqrDense : public lsqrBase
{
public:
lsqrDense();
virtual ~lsqrDense();
/**
* computes y = y + A*x without altering x,
* where A is a matrix of dimensions A[m][n].
* The size of the vector x is n.
* The size of the vector y is m.
*/
void Aprod1(unsigned int m, unsigned int n, const double * x, double * y ) const;
/**
* computes x = x + A'*y without altering y,
* where A is a matrix of dimensions A[m][n].
* The size of the vector x is n.
* The size of the vector y is m.
*/
void Aprod2(unsigned int m, unsigned int n, double * x, const double * y ) const;
/** Householder Transformation: reflects the vector "x" across the
* hyperplane whose normal is defined by vector "z". The dimension of
* the hyperspace is given by "n". */
void HouseholderTransformation(unsigned int n, const double * z, double * x ) const;
/** Set the matrix A of the equation to be solved A*x = b. */
void SetMatrix( double ** A );
private:
double ** A;
};
#endif
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