Marion bio photo

Hi, I'm Marion

A data scientist passionate about the brain. Check out my projects on Brain Computer Interfaces & Machine Learning ♥ Twitter Google+ LinkedIn Github

I developed a Machine Learning algorithm called KOAC - which stands for Kernel-induced Online Agglomerative Clustering

1. Kernel

  • The general idea is to increase the computational power of traditional linear Machine Learning algos by mapping the data into a high-dimensional feature space.
  • This technique is usually refered to as the “kernel method” in ML theory.
  • Inspired from the paper: “Improving the robustness of online agglomerative clustering method based on kernel-induce distance measures”. By Daoqiang Zhang, Songcan Chen, Keren Tan.

2. Online

  • Just the same principle as an online K-means in N dimensions.
  • Stream the data. For each new data point:
    1. Find the closest cluster
    2. Assign the new data point to this cluser
    3. Update the cluster centroid accordingly: new_centroid = old_centroid + (new_datapoint - old_centroid) / cluster_size

3. Agglomerative Clustering

  • Inspired from the paper: “An on-line agglomerative clustering method for non-stationary data”. By I. D. Guedalia, M. London, M. Werman.

Check out the KOAC algorithm on github:

KOAC Github