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java.lang.Object cern.colt.matrix.tfloat.algo.solver.preconditioner.FloatILUT
public class FloatILUT
ILU preconditioner with fill-in. Uses the dual threshold approach of Saad.
Constructor Summary | |
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FloatILUT(RCMFloatMatrix2D LU)
Sets up the preconditioner for the given matrix. |
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FloatILUT(RCMFloatMatrix2D LU,
float tau,
int p)
Sets up the preconditioner for the given matrix |
Method Summary | |
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FloatMatrix1D |
apply(FloatMatrix1D b,
FloatMatrix1D x)
Solves the approximate problem with the given right hand side. |
void |
setMatrix(FloatMatrix2D A)
Sets the operator matrix for the preconditioner. |
FloatMatrix1D |
transApply(FloatMatrix1D b,
FloatMatrix1D x)
Solves the approximate transpose problem with the given right hand side. |
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 FloatILUT(RCMFloatMatrix2D LU, float tau, int p)
LU
- Matrix to use internally. For best performance, its non-zero
pattern should conform to that of the system matrixtau
- Drop tolerancep
- Number of entries to keep on each row in of the factored
matrix. This is in addition to the entries of the original
matrixpublic FloatILUT(RCMFloatMatrix2D LU)
LU
- Matrix to use internally. For best performance, its non-zero
pattern should conform to that of the system matrixMethod Detail |
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public FloatMatrix1D apply(FloatMatrix1D b, FloatMatrix1D x)
FloatPreconditioner
apply
in interface FloatPreconditioner
b
- Right hand side of problemx
- Result is stored here
public FloatMatrix1D transApply(FloatMatrix1D b, FloatMatrix1D x)
FloatPreconditioner
transApply
in interface FloatPreconditioner
b
- Right hand side of problemx
- Result is stored here
public void setMatrix(FloatMatrix2D A)
FloatPreconditioner
setMatrix
in interface FloatPreconditioner
A
- Matrix to setup the preconditioner for. Not modified
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