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Unsupervised Machine Learning with AWS

Unsupervised Machine Learning with AWS

Introduction

To explore AWS unsupervised machine learning, let us first understand what unlabelled data is. Data that have not been tagged with identifying labels, tags, or classifications are called unlabelled data. Using a machine-learning algorithm to analyse and cluster unlabelled datasets is called unsupervised learning. It is also known as unsupervised machine learning. It identifies concealed patterns & data groups in the data that helps in making cross-selling strategies, recognising an image, and defining customer segmentation.

Unsupervised Learning with AWS

Unsupervised learning can be implemented using AWS Glue & Amazon Athena. The data is present on the Amazon S3 cloud instance. AWS Glue takes the data as input and applies K-means clustering to segregate the data into 100 different clusters based on some attributes.

Amazon Athena then comes into play. Athena is used to launch queries on the data. It will fetch you result based on the parameters you have used in Athena’s query. Athena produces the result. Both AWS Glue & Amazon Athena works on their own without any managing servers.

Tasks associated with AWS unsupervised learning

There are three tasks associated with unsupervised learning.  We will explore each of them along with common algorithms and approaches to conduct them effectively and efficiently.

1.    Clustering

Clustering is a data mining technique that groups unlabeled data based on similarities or differences. It is used to process raw unclassified data into groups based on patterns or structures in the information. Some common clustering algorithms are:

·      Exclusive Clustering:

This approach states that one data point can belong to only one cluster. It is also regarded as hard clustering. K-means clustering is an example of exclusive clustering where every data point is divided into K groups. The K represents the number of groups based on distance from each group’s centroid.

·      Hierarchical Clustering

It follows two approaches: the top-down and bottom-up approach. Data points are isolated as different groups and then combined iteratively based on the similarities until one cluster remains.

·      Probabilistic Clustering

It is an unsupervised technique that solves density estimation or ‘soft’ clustering problems. Data points are aggregated based on their belonging to a particular distribution.

2.    Association

It is a rule-based method for identifying the relationship between variables in a given dataset. It helps companies to find associations between products. It facilitates understanding consumer behavior to improve cross-selling strategies. Amazon’s people recently bought these items together is an example of association.

Apriori Algorithm

This algorithm helps in market basket analyses. It is applied to the data that changes frequently. It is also used with the collection of items that have a high probability of purchasing a product given purchase of another product.

3.    Dimension Reduction

Generally, more training data improves the performance of the machine learning model but it makes dataset visualization difficult. This technique is used when the number of dimensions is higher. It reduces massive volume of data into a manageable size. This method is generally used in preprocessing data stage. Different dimension reduction methods are:

  • Principal component analysis: It reduces redundancies and compresses datasets using linear transformation to create a new data representation.
  • Autoencoders: It takes advantage of the neural network to compress data and create a new representation of the original datasets.

Applications of AWS Unsupervised Learning

Machine learning has been widely used to improve user experience and to test systems for quality assurance. Unsupervised learning allows businesses to take leverage of patterns and structures found in large volumes of data. Some of the applications of AWS unsupervised learnings are:

  1. Recommendations: Recommendations of any kind are the outcome of unsupervised learning. In real-time, its applications are recommended products on e-commerce, news, articles, services, etc.
  2. Medical Imaging: Unsupervised learning is used to diagnose patients quickly and accurately. It is also helpful in image detection, classification, & segmentation.
  3. Anomaly Detection: Identifying outliers in the given datasets will detect the anomaly in data. It could be due to human error, faulty equipment, or a security breach.           
  4. Data Mining

Conclusion

We have learned about unsupervised learning, how it works. AWS unsupervised learning has numerous applications in real world. AWS had launched applications to assist in the implementation of unsupervised learning.

Please get in touch with us at contact.us@viruetechinc.com to share your thoughts with us on this and any of your related requirements.

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