ML & Dimensionality Reduction: Performing Principal Component Analysis

Machine Learning 2021    |    Intermediate
  • 11 videos | 1h 15m 30s
  • Includes Assessment
  • Earns a Badge
Principal component analysis (PCA) is a must-know pre-processing technique for anyone working with machine learning (ML). Used to process data fed into ML models, PCA is useful in many scenarios, such as exploratory data analysis, dimensionality reduction, and latent feature extraction. Use this course to learn the basic intuition behind principal component analysis along with how to use PCA. Start by visualizing how principal components work. Then, examine how they can be computed mathematically using the eigenvectors and eigenvalues of the covariance matrix of the data. As you advance, manually compute principal components, view the re-oriented data, and compare this result with the principal components computed. Lastly, use PCA for dimensionality reduction to train a classification model. When you're done, you'll have the skills and knowledge to use PCA to build more robust machine learning models.


  • discover the key concepts covered in this course
    recall the use of matrix operations to represent linear transformations
    recall the intuition behind principal component analysis
    define principal components and their uses
    define eigenvalues and eigenvectors
    mathematically compute principal components
  • compute eigenvalues and eigenvectors
    perform principal component analysis
    build a baseline model using logistic regression
    build a logistic regression model using principal components
    summarize the key concepts covered in this course


  • 2m 12s
  • 4m 45s
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    3.  Change of Basis, The Intuition behind PCA
    7m 34s
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    4.  An Explanation of Principal Components
    6m 38s
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    5.  A Quick Exploration of Eigenvectors and Eigenvalues
    5m 40s
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    6.  Computing Principal Components
    5m 42s
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    7.  Computing Eigenvectors and Eigenvalues
    12m 42s
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    8.  Calculating Principal Components
    10m 40s
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    9.  Building a Baseline Classification Model
    7m 50s
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    10.  Training a Model Using Principal Components
    9m 49s
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    11.  Course Summary
    1m 59s


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