I would like to use unsupervised learning with a technique called diffusion map based manifold learning in Python. The original paper on the diffusion map is An Introduction to Diffusion Maps.
I have already checkout pydiffmap library, but it is super slow with my use case, and I am yet to see someone endorse the correctness of the implementation. I am looking for an alternate implementation in Python or R.
PS: It is also not available in
sklearn, as far as I know. The list of other methods in
sklearn is here.