Package org.ejml.dense.row.decomposition.svd

Class SvdImplicitQrDecompose_UltimateS

  • All Implemented Interfaces:
    org.ejml.interfaces.decomposition.DecompositionInterface<org.ejml.data.DMatrixRMaj>, org.ejml.interfaces.decomposition.SingularValueDecomposition<org.ejml.data.DMatrixRMaj>, org.ejml.interfaces.decomposition.SingularValueDecomposition_F64<org.ejml.data.DMatrixRMaj>
    public class SvdImplicitQrDecompose_UltimateS
extends java.lang.Object
implements org.ejml.interfaces.decomposition.SingularValueDecomposition_F64<org.ejml.data.DMatrixRMaj>

    Similar to SvdImplicitQrDecompose_DDRM but it employs the ultimate shift strategy. Ultimate shift involves first computing singular values then uses those to quickly compute the U and W matrices. For EVD this strategy seems to work very well, but for this problem it needs to have little benefit and makes the code more complex.

    NOTE: This code is much faster for 2x2 matrices since it computes the eigenvalues in one step.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean decompose​(org.ejml.data.DMatrixRMaj orig)  
      double[] getSingularValues()  
      org.ejml.data.DMatrixRMaj getU​(org.ejml.data.DMatrixRMaj U, boolean transpose)  
      org.ejml.data.DMatrixRMaj getV​(org.ejml.data.DMatrixRMaj V, boolean transpose)  
      org.ejml.data.DMatrixRMaj getW​(org.ejml.data.DMatrixRMaj W)  
      boolean inputModified()  
      boolean isCompact()  
      int numberOfSingularValues()  
      int numCols()  
      int numRows()  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • SvdImplicitQrDecompose_UltimateS

        public SvdImplicitQrDecompose_UltimateS​(boolean compact,
                                        boolean computeU,
                                        boolean computeV)

    • Method Detail

      • getSingularValues

        public double[] getSingularValues()
        Specified by:
        getSingularValues in interface org.ejml.interfaces.decomposition.SingularValueDecomposition_F64<org.ejml.data.DMatrixRMaj>

      • numberOfSingularValues

        public int numberOfSingularValues()
        Specified by:
        numberOfSingularValues in interface org.ejml.interfaces.decomposition.SingularValueDecomposition<org.ejml.data.DMatrixRMaj>

      • isCompact

        public boolean isCompact()
        Specified by:
        isCompact in interface org.ejml.interfaces.decomposition.SingularValueDecomposition<org.ejml.data.DMatrixRMaj>

      • getU

        public org.ejml.data.DMatrixRMaj getU​(org.ejml.data.DMatrixRMaj U,
                                      boolean transpose)
        Specified by:
        getU in interface org.ejml.interfaces.decomposition.SingularValueDecomposition<org.ejml.data.DMatrixRMaj>

      • getV

        public org.ejml.data.DMatrixRMaj getV​(org.ejml.data.DMatrixRMaj V,
                                      boolean transpose)
        Specified by:
        getV in interface org.ejml.interfaces.decomposition.SingularValueDecomposition<org.ejml.data.DMatrixRMaj>

      • getW

        public org.ejml.data.DMatrixRMaj getW​(org.ejml.data.DMatrixRMaj W)
        Specified by:
        getW in interface org.ejml.interfaces.decomposition.SingularValueDecomposition<org.ejml.data.DMatrixRMaj>

      • decompose

        public boolean decompose​(org.ejml.data.DMatrixRMaj orig)
        Specified by:
        decompose in interface org.ejml.interfaces.decomposition.DecompositionInterface<org.ejml.data.DMatrixRMaj>

      • inputModified

        public boolean inputModified()
        Specified by:
        inputModified in interface org.ejml.interfaces.decomposition.DecompositionInterface<org.ejml.data.DMatrixRMaj>

      • numRows

        public int numRows()
        Specified by:
        numRows in interface org.ejml.interfaces.decomposition.SingularValueDecomposition<org.ejml.data.DMatrixRMaj>

      • numCols

        public int numCols()
        Specified by:
        numCols in interface org.ejml.interfaces.decomposition.SingularValueDecomposition<org.ejml.data.DMatrixRMaj>