University of Chicago

Fall 2020

This course is about using matrix computations to infer useful information from observed data. One may view it as an "applied" version of Stat 309; the only prerequisite for this course is basic linear algebra. The data analytic tools that we will study will go beyond linear and multiple regression and often fall under the heading of "Multivariate Analysis" in Statistics or "Unsupervised Learning" in Machine Learning. These include factor analysis, correspondence analysis, principal components analysis, multidimensional scaling, canonical correlation analysis, Procrustes analysis, partial least squares, etc. We would also discuss a small number of supervised learning techniques including discriminant analysis and support vector machines. Understanding these techniques require some facility with matrices (primarily eigen and singular value decompositions, as well as their generalization) in addition to some basic statistics, both of which the student will acquire during the course.

- 09/22/20: This year's class will be conducted entirely on Canvas. This webpage would be used only as a mirror repository for course materials.

**Location:** Lectures held online through Canvas.

**Times:** Mon, 6:30–9:30pm

**Instructor:** Lek-Heng
Lim

Office: Jones 122C

`lekheng(at)uchicago.edu`

Tel: (773) 702-4263

Office hours: Tue 2:00–4:00 pm

**Course Assistant I:** Jinhong Du

`dujinhong(at)uchicago.edu`

Office hours: Fri 3:00–5:00 pm.

**Course Assistant II:** Wenxuan
Guo

`wxguo(at)uchicago.edu`

Office hours: Tue 9:00–11:00 am.

The last two applications fall under supervised learning but we will discuss them if time permits, if only to give an idea of how supervised learning differs from unsupervised learning.

**Tools:**- EVD = Eigenvalue decomposition
- SVD = Singular value decomposition
- GEVD = Generalized eigenvalue decomposition
- GSVD = Generalized singular value decomposition
**Applications:**- Principal component analysis (SVD)
- Factor analysis (EVD)
- Canonical correlation analysis (EVD)
- Correspondence analysis (GSVD)
- Hyperlink induced topic search (SVD)
- Latent semantic indexing (SVD)
- Procrustes analysis (SVD)
- Multidimensional scaling (EVD)
- Partial least squares (SVD)
- Linear discriminant analysis (GEVD)
- Support vector machines

Collaborations are permitted but you will need to write up your own solutions and declare your collaborators. The problem sets are designed to get progressively more difficult. You will get about 10 days for each problem set.

You are required to implement your own programs for problems that require some amount of simple coding (using Matlab, Mathematica, R, or SciPy).

- Problem Set 3 (posted: Nov 22, due: Dec 6)

- Problem Set 2 (posted: Nov 7, due: Nov 20)

- Problem Set 1 (posted: Oct 23, due: Nov 6)

**Bug report** on the problem sets:
`lekheng(at)uchicago.edu`

**Grade composition:** 100% Problem Sets.

- Similar courses: Stat 32950. Multivariate Statistical Analysis, Busf 41912/Stat 32900. Applied Multivariate Analysis

You may download some of these books online from an UChicago IP address or via ProxyIt! if you are off-campus.

- G. James, D. Witten, T. Hastie, R. Tibshirani, An Introduction to Statistical Learning, Springer, 2013.

- R. Johnson, D. Wichern, Applied Multivariate Statistical Analysis, 6th Ed, Pearson, 2007.

- K. V. Mardia, J. T. Kent, J. M. Bibby, Multivariate Analysis, Academic Press, 1980.

- C. D. Meyer, Matrix Analysis and Applied Linear Algebra, SIAM, 2001.