BlockSolver Class Reference

solves at best the matrix invertion for calibration More...

#include <BlockSolver.h>

Public Member Functions
int	operator() (const CLHEP::HepMatrix &matrix, const CLHEP::HepVector &vector, CLHEP::HepVector &result)

Private Member Functions
void	pour (CLHEP::HepVector &result, const CLHEP::HepVector &output, const std::vector< int > &where)
	pour results in bigger vector More...
void	shrink (const CLHEP::HepMatrix &matrix, CLHEP::HepMatrix &solution, const CLHEP::HepVector &result, CLHEP::HepVector &input, const std::vector< int > &where)
	eliminate empty columns and rows More...

Detailed Description

solves at best the matrix invertion for calibration

Definition at line 21 of file BlockSolver.h.

Member Function Documentation

operator()()

int BlockSolver::operator()	(	const CLHEP::HepMatrix &	matrix,
		const CLHEP::HepVector &	vector,
		CLHEP::HepVector &	result
	)

Definition at line 6 of file BlockSolver.cc.

References cuy::col, mps_fire::i, input, makeMuonMisalignmentScenario::matrix, pour(), mps_fire::result, shrink(), DiMuonV_cfg::threshold, and trackerHitRTTI::vector.

                                                                                                              {
  double threshold = matrix.trace() / static_cast<double>(matrix.num_row());
  std::vector<int> holes;
  // loop over the matrix rows
  for (int row = 0; row < matrix.num_row(); ++row) {
    double sumAbs = 0.;
    for (int col = 0; col < matrix.num_col(); ++col)
      sumAbs += fabs(matrix[row][col]);
    if (sumAbs < threshold)
      holes.push_back(row);
  }  // loop over the matrix rows

  int dim = matrix.num_col() - holes.size();

  if (holes.empty())  //PG exceptional case!
  {
    for (int i = 0; i < result.num_row(); ++i)
      result[i] = 1.;
  } else if (dim > 0) {
    CLHEP::HepMatrix solution(dim, dim, 0);
    CLHEP::HepVector input(dim, 0);
    shrink(matrix, solution, vector, input, holes);
    CLHEP::HepVector output = solve(solution, input);
    pour(result, output, holes);
  }
  return holes.size();
}

pour()

void BlockSolver::pour ( CLHEP::HepVector &  result, const CLHEP::HepVector &  output, const std::vector< int > &  where  )

private

pour results in bigger vector

Definition at line 69 of file BlockSolver.cc.

References mps_fire::result.

Referenced by operator()().

                                                                                                        {
  std::vector<int>::const_iterator whereCols = where.begin();
  int readingIndex = 0;
  //PG loop over the output crystals
  for (int xtal = 0; xtal < result.num_row(); ++xtal) {
    if (xtal == *whereCols) {
      result[xtal] = 1.;
      ++whereCols;
    } else {
      result[xtal] = output[readingIndex];
      ++readingIndex;
    }
  }  //PG loop over the output crystals

  return;
}

shrink()

void BlockSolver::shrink ( const CLHEP::HepMatrix &  matrix, CLHEP::HepMatrix &  solution, const CLHEP::HepVector &  result, CLHEP::HepVector &  input, const std::vector< int > &  where  )

private

eliminate empty columns and rows

Definition at line 36 of file BlockSolver.cc.

References cuy::col, input, makeMuonMisalignmentScenario::matrix, and mps_fire::result.

Referenced by operator()().

                                                      {
  int offsetRow = 0;
  std::vector<int>::const_iterator whereRows = where.begin();
  // loop over rows
  for (int row = 0; row < matrix.num_row(); ++row) {
    if (row == *whereRows) {
      //          std::cerr << "        DEBUG shr hole found " << std::endl ;
      ++offsetRow;
      ++whereRows;
      continue;
    }
    input[row - offsetRow] = result[row];
    int offsetCol = 0;
    std::vector<int>::const_iterator whereCols = where.begin();
    // loop over columns
    for (int col = 0; col < matrix.num_col(); ++col) {
      if (col == *whereCols) {
        ++offsetCol;
        ++whereCols;
        continue;
      }
      solution[row - offsetRow][col - offsetCol] = matrix[row][col];
    }
  }  // loop over rows
  return;
}