C/C++ Machine Learning Libraries for Clustering [closed]

Answer 1

The Open Source C Clustering Library from the Human Genome team at the University of Tokyo looks promising. It has K-means as well as other flat hierarchical clustering algorithms. Scroll down in their page for the bare library without the GUI. The Wikipedia-Clustering project seems nice and a bit lighter. Here's a specialized K-means library from The University of Mariland. I suggest you look at these considering your type of data. Preprocessing data to create feature vectors may be challenging.

Answer 2

I am not sure if you are looking for algorithms like C4.5, ID3 etc or not. If you do, you can download the individual sources from university websites where they are actively researched.

E.g: C4.5 Source can be found at Quinlan's website.