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java.lang.Objectcern.colt.matrix.tdouble.algo.solver.AbstractDoubleIterativeSolver
cern.colt.matrix.tdouble.algo.solver.DoubleQMR
public class DoubleQMR
Quasi-Minimal Residual method. QMR solves the unsymmetric linear system
Ax = b
using the Quasi-Minimal Residual method. QMR uses two
preconditioners, and by default these are the same preconditioner.
Constructor Summary | |
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DoubleQMR(DoubleMatrix1D template)
Constructor for QMR. |
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DoubleQMR(DoubleMatrix1D template,
DoublePreconditioner M1,
DoublePreconditioner M2)
Constructor for QMR. |
Method Summary | |
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void |
setPreconditioner(DoublePreconditioner M)
Sets preconditioner |
DoubleMatrix1D |
solve(DoubleMatrix2D A,
DoubleMatrix1D b,
DoubleMatrix1D x)
Solves the given problem, writing result into the vector. |
Methods inherited from class cern.colt.matrix.tdouble.algo.solver.AbstractDoubleIterativeSolver |
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getIterationMonitor, getPreconditioner, setIterationMonitor |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public DoubleQMR(DoubleMatrix1D template)
template
- Vector to use as template for the work vectors needed in the
solution processpublic DoubleQMR(DoubleMatrix1D template, DoublePreconditioner M1, DoublePreconditioner M2)
template
- Vector to use as template for the work vectors needed in the
solution processM1
- Left preconditionerM2
- Right preconditionerMethod Detail |
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public DoubleMatrix1D solve(DoubleMatrix2D A, DoubleMatrix1D b, DoubleMatrix1D x) throws IterativeSolverDoubleNotConvergedException
DoubleIterativeSolver
A
- Matrix of the problemb
- Right hand sidex
- Solution is stored here. Also used as initial guess
IterativeSolverDoubleNotConvergedException
public void setPreconditioner(DoublePreconditioner M)
DoubleIterativeSolver
setPreconditioner
in interface DoubleIterativeSolver
setPreconditioner
in class AbstractDoubleIterativeSolver
M
- Preconditioner to use
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