Week 13 β€” Unsupervised (11/14–18)#

In this week, we are going to talk more about unsupervised learning β€” learning without labels. We are not going to have time to investigate these techniques very deeply, but I want you to know about them, and you are experimenting with them in Assignment 6.

This week’s content is lighter, since we just had a large assignment and a midterm, and another assignment is due on Sunday.

🧐 Content Overview#

Element Length

πŸŽ₯Β No Supervision


πŸŽ₯Β Decomposing Matrices


πŸŽ₯Β Clustering


πŸŽ₯Β Vectors and Spaces


πŸŽ₯Β Information and Entropy


This week has 0h45m of video and 0 words of assigned readings. This week’s videos are available in a Panopto folder.

πŸ“… Deadlines#

πŸŽ₯ No Supervision#

In this video, we review the idea of supervised learning and contrast it with unsupervised learning.

πŸŽ₯ Decomposing Matrices#

This video introduces the idea of matrix decomposition, which we can use to reduce the dimensionality of data points.


πŸ““ Movie Decomposition#

The Movie Decomposition notebook demonstrates matrix decomposition with movie data.

πŸŽ₯ Clustering#

This video introduces the concept of clustering, another useful unsupervised learning technique.


πŸ““ Clustering Example#

The clustering example notebook shows how to use the KMeans class.

πŸŽ₯ Vector Spaces#

This video talks about vector spaces and transforms.


πŸŽ₯ Information and Entropy#

This video introduces the idea of entropy as a way to quantify information. It’s something I want to make sure you’ve seen at least once by the end of the class.


🚩 Week 13 Quiz#

Take the Week 13 quiz on Canvas.

πŸ““ Practice: SVD on Paper Abstracts#

The Week 13 Exercise notebook demonstrates latent semantic analysis on paper abstracts and has an exercise to classify text into new or old papers.

It requires the chi-papers.csv file, which is derived from the HCI Bibliography. It is the abstracts from papers published at the CHI conference (the primary conference for human-computer interaction) over a period of nearly 40 years.

If you want to see how to create this file, see the Fetch CHI Papers example.

πŸ“© Assignment 6#

Assignment 6 is due November 20.