Data Science and Machine Learning (Theory and Projects) A to Z - Feature Selection: Similarity Based Methods Criteria

The video tutorial explores similarity-based methods in feature selection, focusing on unsupervised techniques like the Laplacian score, which preserves data manifold structure. It explains the Laplacian matrix's role in spectral clustering and feature extraction. The tutorial also covers spec and Fisher score methods, highlighting their approaches to preserving data similarity and maximizing class separation. It concludes with a discussion on feature redundancy and the importance of understanding filter methods. The next video will implement these methods in Python.

What is the role of class labels in the computation of the Laplacian score?

Summarize the key differences between supervised and unsupervised feature selection methods.

How does the Relief F method approach feature selection?

What challenges do similarity-based methods face regarding feature redundancy?