Clustering using k-Means with implementation

Clustering is a technique to find natural groups in the data. If we show the above picture to a kid, he can identify that there are four types of animals. He may not know the names of all of them, but he can still identify that there are four different types and he can do this independently, without the help of an adult. As we don't need an adult to supervise, clustering is an unsupervised technique. The three motivations can be listed as follows.