Update README.md

Author: DolbyUUU

README.md

@@ -1,6 +1,18 @@
-# clustering algorithm implementaion and visualization from scratch with python
+# Clustering algorithm implementaion and visualization from scratch with python
+
+Three popular clustering algorithms (for d >= 2 dimensions, k >= 2 clusters):
 (1) k-means
 (2) EM-GMM (Gaussian mixture model - expectation maximization)
 (3) mean-shift
 
+Python implementations:
+KMeans.py: k-means
+GaussianMM.py: EM-GMM (Gaussian mixture model - expectation maximization)
+GaussianMM_Ver0.py: another version for EM-GMM (Gaussian mixture model - expectation maximization)
+MeanShift.py: mean-shift
+MeanShift_Ver0.py: another version for mean-shift
 
+Test on 2D datasets for visualization, compared with sklearn implementation:
+(1) blobs pattern
+(2) sticks pattern
+(3) moon and stars pattern