Method Detail

• clear

  void clear()

  Sets all counters to zero.

• getDimension

  int getDimension()

  Returns the dimension of this matrix. This is the number of rows and columns.

  Returns:

  matrix dimension (larger than zero)

• getValue

  int getValue​(int i,
               int j)

  Returns the matrix value at a given position.

  Parameters:

  i - column index, from 0 to getDimension() - 1

  j - row index, from 0 to getDimension() - 1

  Throws:

  IllegalArgumentException - for invalid index pairs (i, j)

• incValue

  void incValue​(int i,
                int j)

  Increases the counter for pair (i, j) by one. This method can be implemented by the call setValue(i, j, getValue(i, j) + 1);.

  Parameters:

  i - column index, from 0 to getDimension() - 1

  j - row index, from 0 to getDimension() - 1

  Throws:

  IllegalArgumentException - for invalid index pairs (i, j)

• setValue

  void setValue​(int i,
                int j,
                int newValue)

  Sets the counter for pair (i, j) to a new value.

  Parameters:

  i - column index, from 0 to getDimension() - 1

  j - row index, from 0 to getDimension() - 1

  Throws:

  IllegalArgumentException - for invalid index pairs (i, j)