Methods Detail

• public double[] column(int col)

  Select a column from a 2D array.

  double[][] nums = [[1.0d, 2.0d], [10.0d, 20.0d]]
  assert nums.column(0) == [1.0d, 10.0d] as double[]
  assert nums.column(1) == [2.0d, 20.0d] as double[]
  

  Parameters:

  Returns:

  a double[]

  Since:

  5.0.0

• public double[][] eachColumn(Closure closure)

  Process the columns of the array.

  double[][] nums = [[1.0d, 2.0d], [10.0d, 20.0d]]
  nums.eachColumn {
      assert it[0] * 10.0d == it[1]
  }
  

  Parameters:

  closure - the closure applied on each array column

  Returns:

  the self array

  Since:

  5.0.0

• public List flatten()

  Flattens a 2D array into a new collection. The items are copied row by row.

  Example usage:

  double[][] array = [[0.0f, 1.0f], [2.0f, 3.0f]]
  assert array.flatten() == [0.0f, 1.0f, 2.0f, 3.0f]
  

  Returns:

  a Collection of the array elements

  Since:

  5.0.0

• public double[][] transpose()

  A transpose method for 2D double arrays.

  Example usage:

  double[][] doubles = [[1.0d, 10.0d], [2.0d, 20.0d]]
  double[][] expected = [[1.0d, 2.0d], [10.0d, 20.0d]]
  def result = doubles.transpose()
  assert result == expected
  assert doubles.class.componentType == result.class.componentType
  

  Returns:

  the transposed 2D double array

  Since:

  3.0.8

• public Iterator transposing()

  An iterator of the columns of the array.

  double[][] nums = [[1.0d, 2.0d], [10.0d, 20.0d]]
  assert nums.transpose() == nums.transposing().toList()
  

  Returns:

  the iterator

  Since:

  5.0.0