Hierarchical Clustering in Machine Learning

Hierarchical Clustering is a part of unsupervised Machine Learning. Hierarchical clustering is also known as Hierarchical Cluster Analysis (HCA) is unsupervised Machine Learning. It groups unlabeled data sets into groups also Known as clusters. They look quite similar to K-means Clustering but it's different from it as here we don't decide the number of clusters as we do it in K-means Clustering. As here we don't face the challenges that we face in K-mean clustering due to predetermined clusters.