This page contains a c-code and an R-code for the ridge finding algorithm.
The c-code is written by Zun Yi (Brent) Tan (zunyibrt@andrew.cmu.edu), an undergraduate student at Carnegie Mellon University.
Please cite the following papers when using the code:
1. Ozertem, Umut, and Deniz Erdogmus. "Locally Defined Principal Curves and Surfaces. " The Journal of Machine Learning Research 12 (2011): 1249-1286.
2. Chen, Yen-Chi, Shirley Ho, Peter E. Freeman, Christopher R. Genovese, and Larry Wasserman. ``Cosmic Web Reconstruction through Density Ridges: Method and Algorithm." arXiv: 1501.05303