def __init__(self, k, alg='LLE', nodeargs=None, **kwargs):
"""
Parameters
----------
k : int
Number of nearest neighbors to be used by the algorithm.
algorithm : {'LLE', 'HLLE'}
Either use the standard LLE algorithm or Hessian Linear Local
Embedding (HLLE).
nodeargs : None or dict
Arguments passed to the MDP node in various stages of its lifetime.
See the baseclass for more details.
**kwargs
Additional constructor arguments for the MDP node.
"""
if alg == 'LLE':
node = mdp.nodes.LLENode(k, **kwargs)
elif alg == 'HLLE':
node = mdp.nodes.HLLENode(k, **kwargs)
else:
raise ValueError("Unkown algorithm '%s' for LLEMapper.")
MDPNodeMapper.__init__(self, node, nodeargs=nodeargs)
