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java.lang.Objectcern.colt.matrix.tdouble.algo.DoubleStencil
public class DoubleStencil
Stencil operations. For efficient finite difference operations. Applies a function to a moving 3 x 3 or 3 x 3 x 3 window. Build on top of matrix.zAssignXXXNeighbors(...). You can specify how many iterations shall at most be done, a convergence condition when iteration shall be terminated, and how many iterations shall pass between convergence checks. Always does two iterations at a time for efficiency. These class is for convencience and efficiency.
Method Summary | |
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static int |
stencil27(DoubleMatrix3D A,
Double27Function function,
int maxIterations,
DoubleMatrix3DProcedure hasConverged,
int convergenceIterations)
27 point stencil operation. |
static int |
stencil9(DoubleMatrix2D A,
Double9Function function,
int maxIterations,
DoubleMatrix2DProcedure hasConverged,
int convergenceIterations)
9 point stencil operation. |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public static int stencil27(DoubleMatrix3D A, Double27Function function, int maxIterations, DoubleMatrix3DProcedure hasConverged, int convergenceIterations)
A
- the matrix to operate on.function
- the function to be applied to each window.maxIterations
- the maximum number of times the stencil shall be applied to
the matrix. Should be a multiple of 2 because two iterations
are always done in one atomic step.hasConverged
- Convergence condition; will return before maxIterations are
done when hasConverged.apply(A)==true. Set this
parameter to null to indicate that no convergence
checks shall be made.convergenceIterations
- the number of iterations to pass between each convergence
check. (Since a convergence may be expensive, you may want to
do it only every 2,4 or 8 iterations.)
public static int stencil9(DoubleMatrix2D A, Double9Function function, int maxIterations, DoubleMatrix2DProcedure hasConverged, int convergenceIterations)
A
- the matrix to operate on.function
- the function to be applied to each window.maxIterations
- the maximum number of times the stencil shall be applied to
the matrix. Should be a multiple of 2 because two iterations
are always done in one atomic step.hasConverged
- Convergence condition; will return before maxIterations are
done when hasConverged.apply(A)==true. Set this
parameter to null to indicate that no convergence
checks shall be made.convergenceIterations
- the number of iterations to pass between each convergence
check. (Since a convergence may be expensive, you may want to
do it only every 2,4 or 8 iterations.)
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