org.ejml.alg.dense.decomposition
Interface QRPDecomposition<T extends Matrix64F>

All Superinterfaces:

DecompositionInterface<T>, QRDecomposition<T>

All Known Implementing Classes:

QRColPivDecompositionHouseholderColumn

public interface QRPDecomposition<T extends Matrix64F>
extends QRDecomposition<T>

Similar to QRDecomposition but it can handle the rank deficient case by performing column pivots during the decomposition. The final decomposition has the following structure:
A*P=Q*R
where A is the original matrix, P is a pivot matrix, Q is an orthogonal matrix, and R is upper triangular.

Author:

Peter Abeles

Method Summary

DenseMatrix64F	getPivotMatrix(DenseMatrix64F P)
int[]	getPivots()
int	getRank() Returns the rank as determined by the algorithm.

Methods inherited from interface org.ejml.alg.dense.decomposition.QRDecomposition

getQ, getR

Methods inherited from interface org.ejml.alg.dense.decomposition.DecompositionInterface

decompose, inputModified

Method Detail

getRank

int getRank()

Returns the rank as determined by the algorithm. This is dependent upon a fixed threshold and might not be appropriate for some applications.

Returns:

Matrix's rank

getPivots

int[] getPivots()

getPivotMatrix

DenseMatrix64F getPivotMatrix(DenseMatrix64F P)