//@Override
public void solve(DMatrixRMaj B, DMatrixRMaj X)
{
double[] b = TriangularSolver_DSCC.adjust(gb, B.numRows);
double[] bp = TriangularSolver_DSCC.adjust(gbp, B.numRows);
double[] x = TriangularSolver_DSCC.adjust(gx, X.numRows);
int[] pinv = qr.getStructure().getPinv();
// process each column in X and B individually
for (int colX = 0; colX < X.numCols; colX++)
{
int index = colX;
for (int i = 0; i < B.numRows; i++, index += X.numCols)
{
b[i] = B.data[index];
}
// apply row pivots
CommonOps_DSCC.permuteInv(pinv, b, bp, m);
// apply Householder reflectors
for (int j = 0; j < n; j++)
{
QrHelperFunctions_DSCC.applyHouseholder(qr.getV(), j, qr.getBeta(j), bp);
}
// Solve for R*x = b
TriangularSolver_DSCC.solveU(qr.getR(), bp);
// undo the permutation
double[] output;
if (qr.isFillPermutated())
{
CommonOps_DSCC.permute(qr.getFillPermutation(), bp, x, X.numRows);
output = x;
}
else
{
output = bp;
}
index = colX;
for (int i = 0; i < X.numRows; i++, index += X.numCols)
{
X.data[index] = output[i];
}
}
}
//@Override
public void solve(DMatrixRMaj B, DMatrixRMaj X)
{
// if( B.numCols != X.numCols || B.numRows != numRows || X.numRows != numCols) {
// throw new ArgumentException("Unexpected matrix size");
// }
int[] pinv = decomposition.getPinv();
int[] q = decomposition.getReducePermutation();
double[] x = TriangularSolver_DSCC.adjust(gx, X.numRows);
double[] b = TriangularSolver_DSCC.adjust(gb, B.numRows);
DMatrixSparseCSC L = decomposition.getL();
DMatrixSparseCSC U = decomposition.getU();
bool reduceFill = decomposition.getReduceFill() != null;
// process each column in X and B individually
for (int colX = 0; colX < X.numCols; colX++)
{
int index = colX;
for (int i = 0; i < B.numRows; i++, index += X.numCols)
{
b[i] = B.data[index];
}
CommonOps_DSCC.permuteInv(pinv, b, x, X.numRows);
TriangularSolver_DSCC.solveL(L, x);
TriangularSolver_DSCC.solveU(U, x);
double[] d;
if (reduceFill)
{
CommonOps_DSCC.permute(q, x, b, X.numRows);
d = b;
}
else
{
d = x;
}
index = colX;
for (int i = 0; i < X.numRows; i++, index += X.numCols)
{
X.data[index] = d[i];
}
}
}