Field Detail

• dimension

  private final int dimension

  will be initialized in constructor and never changed

• numValues

  private int numValues

  total number of values, equals dimension * dimension and data.length

• data

  private double[] data

  co occurrence frequency values

Constructor Detail

• MemoryCoOccurrenceFrequencyMatrix

  public MemoryCoOccurrenceFrequencyMatrix​(int dimension)

  Creates a co-occurrence frequency matrix of given dimension; allocates dimension times dimension double values for internal array; does not call clear() to set everything to zero, must be done by user (or automatically in init). Dimension should be number of colors in palette.

  Throws:

  IllegalArgumentException - if dimension is smaller than 1

Method Detail

• clear

  public void clear()

  Sets all values of this matrix to zero.

• getDimension

  public int getDimension()

  Description copied from interface: CoOccurrenceFrequencyMatrix
  Returns the dimension of this matrix.

• getValue

  public double getValue​(int i)
                  throws IllegalArgumentException

  Returns the value of this matrix at row i, column i. Argument is zero-based, so make sure that 0 <= i < getDimension(). Other values will raise an IllegalArgumentException. Simply calls getValue(i, i).

  Parameters:

  i - index into the matrix, must be larger than or equal to 0 and smaller than CoOccurrenceFrequencyMatrix.getDimension()

  Throws:

  IllegalArgumentException

• getValue

  public double getValue​(int i,
                         int j)
                  throws IllegalArgumentException

  Returns the value of this matrix at row j, column i. Both arguments are zero-based, so make sure that 0 <= i, j < getDimension(). Other values will raise an IllegalArgumentException.

  Throws:

  IllegalArgumentException

• setValue

  public void setValue​(int i,
                       int j,
                       double newValue)
                throws IllegalArgumentException

  Sets value at row j, column i to newValue. Both arguments are zero-based, so make sure that 0 <= i, j < getDimension(). Other values will raise an IllegalArgumentException.

  Throws:

  IllegalArgumentException