Package org.ejml.dense.row.misc

Class DeterminantFromMinor_FDRM

  • public class DeterminantFromMinor_FDRM
extends java.lang.Object

    Computes the determinant of a matrix using Laplace expansion. This is done using minor matrices as is shown below:

    |A| = Sum{ i=1:k ; aij Cij }

    Cij = (-1)i+j Mij

    Where M_ij is the minor of matrix A formed by eliminating row i and column j from A.

    This is significantly more computationally expensive than using LU decomposition, but its computation has the advantage being independent of the matrices value.

    See Also:
    LUDecompositionAlt_FDRM

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      float compute​(org.ejml.data.FMatrix1Row mat)
      Computes the determinant for the specified matrix.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • DeterminantFromMinor_FDRM

        public DeterminantFromMinor_FDRM​(int width)
        Parameters:
        width - The width of the matrices that it will be computing the determinant for

      • DeterminantFromMinor_FDRM

        public DeterminantFromMinor_FDRM​(int width,
                                 int minWidth)
        Parameters:
        width - The width of the matrices that it will be computing the determinant for
        minWidth - At which point should it use a predefined function to compute the determinant.

    • Method Detail

      • compute

        public float compute​(org.ejml.data.FMatrix1Row mat)
        Computes the determinant for the specified matrix. It must be square and have the same width and height as what was specified in the constructor.
        Parameters:
        mat - The matrix whose determinant is to be computed.
        Returns:
        The determinant.