Unsupervised learning is a type of machine learning in which the algorithm is not provided with any pre-assigned labels or scores for the training data. As a result, unsupervised learning algorithms must first self-discover any naturally occurring patterns in that training data set.

Which of the following is unsupervised machine learning?

Below is the list of some popular unsupervised learning algorithms: K-means clustering. KNN (k-nearest neighbors) Hierarchal clustering.

Which algorithm is used in unsupervised machine learning?

Some popular examples of unsupervised learning algorithms are: k-means for clustering problems. Apriori algorithm for association rule learning problems.