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scipy.spatial.transform.RigidTransform.

# __getitem__

RigidTransform.__getitem__(indexer)

  Extract transform(s) at given index(es) from this object.

  Creates a new `RigidTransform` instance containing a subset of transforms stored in this object.

  Parameters:
    indexer int or slice or array_like

      Specifies which transform(s) to extract. A single indexer must be specified, i.e. as if indexing a 1 dimensional array or list.

  Returns:
    transform `RigidTransform` instance
      Contains

        - a single transform, if indexer is a single index

        - a stack of transform(s), if indexer is a slice, or an index array.

  Raises:
    TypeError

      If the transform is a single transform.

  Examples

      >>> from scipy.spatial.transform import RigidTransform as Tf
      >>> t = [[0, 0, 0], [1, 0, 0], [2, 0, 0]]  # 3 translations
      >>> tf = Tf.from_translation(t)

  A single index returns a single transform:

      >>> tf[0].as_matrix()
      array([[1., 0., 0., 0.],
             [0., 1., 0., 0.],
             [0., 0., 1., 0.],
             [0., 0., 0., 1.]])

  A slice returns a stack of transforms:

      >>> tf[1:3].translation
      array([[1., 0., 0.],
             [2., 0., 0.]])

  An index array returns a stack of transforms:

      >>> tf[[0, 2]].translation
      array([[0., 0., 0.],
             [2., 0., 0.]])