In this example toy data is being processed using the Local Tangent Space
Alignment (LTSA) algorithms as described in

Zhang, Z., & Zha, H. (2002). Principal Manifolds
and Nonlinear Dimension Reduction via Local Tangent Space Alignment.
Journal of Shanghai University English Edition, 8(4), 406-424. SIAM.
Retrieved from http://arxiv.org/abs/cs/0212008

Before processing the number of neighbors for computing local tangent space
is set
