48 lines
1.0 KiB
C++
48 lines
1.0 KiB
C++
#include <cassert>
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#include "GEFullMatParPv.h"
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#include "SingularMatrixError.h"
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using namespace MbD;
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void MbD::GEFullMatParPv::doPivoting(int p)
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{
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//"Use scalings. Do row pivoting."
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//| app max rowPivot aip mag |
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auto app = matrixA->at(p)->at(p);
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auto max = app * rowScalings->at(p);
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if (max < 0.0) max = -max;
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auto rowPivot = p;
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for (int i = p + 1; i < m; i++)
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{
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auto aip = matrixA->at(i)->at(p);
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if (aip != 0.0) {
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auto mag = aip * rowScalings->at(i);
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if (mag < 0) mag = -mag;
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if (max < mag) {
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max = mag;
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rowPivot = i;
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}
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}
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}
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if (p != rowPivot) {
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matrixA->swapElems(p, rowPivot);
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rightHandSideB->swapElems(p, rowPivot);
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rowScalings->swapElems(p, rowPivot);
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rowOrder->swapElems(p, rowPivot);
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}
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pivotValues->at(p) = max;
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if (max < singularPivotTolerance) throwSingularMatrixError("");
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}
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void MbD::GEFullMatParPv::postSolve()
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{
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assert(false);
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}
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void MbD::GEFullMatParPv::preSolvewithsaveOriginal(FMatDsptr fullMat, FColDsptr fullCol, bool saveOriginal)
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{
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assert(false);
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}
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