Package org.ejml.sparse.csc

Class RandomMatrices_FSCC

  • public class RandomMatrices_FSCC
extends java.lang.Object

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static void ensureNotSingular​(org.ejml.data.FMatrixSparseCSC A, java.util.Random rand)
      Modies the matrix to make sure that at least one element in each column has a value
      static int nonzero​(int numRows, int numCols, float minFill, float maxFill, java.util.Random rand)  
      static org.ejml.data.FMatrixSparseCSC rectangle​(int numRows, int numCols, int nz_total, float min, float max, java.util.Random rand)
      Randomly generates matrix with the specified number of non-zero elements filled with values from min to max.
      static org.ejml.data.FMatrixSparseCSC rectangle​(int numRows, int numCols, int nz_total, java.util.Random rand)  
      static org.ejml.data.FMatrixSparseCSC symmetric​(int N, int nz_total, float min, float max, java.util.Random rand)
      Creates a random symmetric matrix.
      static org.ejml.data.FMatrixSparseCSC symmetricPosDef​(int width, float probabilityZero, java.util.Random rand)
      Creates a random symmetric positive definite matrix with zero values.
      static org.ejml.data.FMatrixSparseCSC triangle​(boolean upper, int N, float minFill, float maxFill, java.util.Random rand)
      Creates a triangular matrix where the amount of fill is randomly selected too.
      static org.ejml.data.FMatrixSparseCSC triangleLower​(int dimen, int hessenberg, int nz_total, float min, float max, java.util.Random rand)
      Randomly generates lower triangular (or hessenberg) matrix with the specified number of of non-zero elements.
      static org.ejml.data.FMatrixSparseCSC triangleUpper​(int dimen, int hessenberg, int nz_total, float min, float max, java.util.Random rand)  

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • RandomMatrices_FSCC

        public RandomMatrices_FSCC()

    • Method Detail

      • rectangle

        public static org.ejml.data.FMatrixSparseCSC rectangle​(int numRows,
                                                       int numCols,
                                                       int nz_total,
                                                       float min,
                                                       float max,
                                                       java.util.Random rand)
        Randomly generates matrix with the specified number of non-zero elements filled with values from min to max.
        Parameters:
        numRows - Number of rows
        numCols - Number of columns
        nz_total - Total number of non-zero elements in the matrix
        min - Minimum element value, inclusive
        max - Maximum element value, inclusive
        rand - Random number generator
        Returns:
        Randomly generated matrix

      • rectangle

        public static org.ejml.data.FMatrixSparseCSC rectangle​(int numRows,
                                                       int numCols,
                                                       int nz_total,
                                                       java.util.Random rand)

      • symmetric

        public static org.ejml.data.FMatrixSparseCSC symmetric​(int N,
                                                       int nz_total,
                                                       float min,
                                                       float max,
                                                       java.util.Random rand)
        Creates a random symmetric matrix. The entire matrix will be filled in, not just a triangular portion.
        Parameters:
        N - Number of rows and columns
        nz_total - Number of nonzero elements in the triangular portion of the matrix
        min - Minimum element value, inclusive
        max - Maximum element value, inclusive
        rand - Random number generator
        Returns:
        Randomly generated matrix

      • triangleLower

        public static org.ejml.data.FMatrixSparseCSC triangleLower​(int dimen,
                                                           int hessenberg,
                                                           int nz_total,
                                                           float min,
                                                           float max,
                                                           java.util.Random rand)
        Randomly generates lower triangular (or hessenberg) matrix with the specified number of of non-zero elements. The diagonal elements must be non-zero.
        Parameters:
        dimen - Number of rows and columns
        hessenberg - Hessenberg degree. 0 is triangular and 1 or more is Hessenberg.
        nz_total - Total number of non-zero elements in the matrix. Adjust to meet matrix size constraints.
        min - Minimum element value, inclusive
        max - Maximum element value, inclusive
        rand - Random number generator
        Returns:
        Randomly generated matrix

      • triangleUpper

        public static org.ejml.data.FMatrixSparseCSC triangleUpper​(int dimen,
                                                           int hessenberg,
                                                           int nz_total,
                                                           float min,
                                                           float max,
                                                           java.util.Random rand)

      • nonzero

        public static int nonzero​(int numRows,
                          int numCols,
                          float minFill,
                          float maxFill,
                          java.util.Random rand)

      • triangle

        public static org.ejml.data.FMatrixSparseCSC triangle​(boolean upper,
                                                      int N,
                                                      float minFill,
                                                      float maxFill,
                                                      java.util.Random rand)
        Creates a triangular matrix where the amount of fill is randomly selected too.
        Parameters:
        upper - true for upper triangular and false for lower
        N - number of rows and columns er * @param minFill minimum fill fraction
        maxFill - maximum fill fraction
        rand - random number generator
        Returns:
        Random matrix

      • symmetricPosDef

        public static org.ejml.data.FMatrixSparseCSC symmetricPosDef​(int width,
                                                             float probabilityZero,
                                                             java.util.Random rand)
        Creates a random symmetric positive definite matrix with zero values.
        Parameters:
        width - number of columns and rows
        probabilityZero - How likely a value is of being zero. 0 = no zeros. 1.0f = all zeros
        rand - random number generator
        Returns:
        Random matrix

      • ensureNotSingular

        public static void ensureNotSingular​(org.ejml.data.FMatrixSparseCSC A,
                                     java.util.Random rand)
        Modies the matrix to make sure that at least one element in each column has a value