1/19/24, 12:40 AM Week 3 Assignment: Testing Go for Statistics (Winter 2024) Week 3 Assignment: Testing Go for Statistics (Winter 2024)
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Management Problem
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Managers of a technology startup are keen on limiting the number of computer languages supported by the company. They would like software engineers and data scientists to work together using the same language for backend research and product development. In particular, they want to see employees using Go as their primary programming language.
The managers know that Go will serve the company’s needs for backend web and database servers. They know that Go is the right language for distributed service offerings on the cloud. But they are concerned that it may be difficult to convince data scientists to use Go rather than Python or R.
Searches at https://go.dev/ (https://go.dev/) point to numerous statistics, machine learning, and neural network packages that may serve the needs of data scientists. One statistics package they are looking at, in particular, is listed at https://pkg.go.dev/github.com/montanaflynn/stats (https://pkg.go.dev/github.com/montanaflynn/stats) with a GitHub repository at https://github.com/montanaflynn/stats (https://github.com/montanaflynn/stats) . As of June 19, 2023, this pure Go statistics package had 28 contributors and more than 15 thousand users.
The company’s data scientists are concerned about the prospect of having to use Go for their work. At the very least, the data scientists want to ensure that the proposed Go statistics package will provide correct answers. Tests could examine Go linear regression results against results from Python and R. It is suggested that an initial test be run on four small data sets: The Anscombe Quartet as described by Anscombe (1973) and Miller (2015).
Assignment Requirements
Take on the role of the company’s data scientists. Using data from The Anscombe Quartet and the Go testing package, ensure that the Go statistical package yields results comparable to those obtained from Python and R. In particular, ensure that similar results are obtained for estimated linear regression coefficients. Also, use the Go testing package to obtain program execution times and compare these with execution times observed from running Python and R programs on The Anscombe Quartet.
The Anscombe Quartet, developed by Anscombe (1973), is a set of four data sets with one independent variable x and one dependent variable y. Simple linear regression of y on x yields identical estimates of regression coefficients despite the fact that these are very different data sets. The Anscombe Quartet provides a telling demonstration of the importance of data visualization. Here is a plot of the four data sets generated from an R program in Miller (2015):
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1/19/24, 12:40 AM Week 3 Assignment: Testing Go for Statistics (Winter 2024)
As part of the program documentation (in a README.md file), include a recommendation to management. Note any concerns that data scientists might have about using the Go statistics package instead of Python or R statistical packages.
The testing package in the Go standard library provides methods for testing and benchmarking, although “benchmarking” with the Go testing library is now what we mean by running a performance benchmark in this assignment. And the go test tool is bundled into the Go programming environment. Bates and LaNou (2023) and Bodner (2021) provide Go programming examples of testing and benchmarking as needed for this assignment. Want to learn test-driven development while you learn Go? Check out Chris James’s GitBook Learn Go with Tests (https://quii.gitbook.io/learn-go-with-tests/)
Chloé Powell provides a brief introduction to unit testing in Go, highlighting the testing and testify packages: Unit Testing in Golang (https://www.youtube.com/watch?v=U-eO9_lNi7w) .
Want to take your unit testing to the next level? Check out the GitHub repository for testify (https://github.com/stretchr/testify) .
Grading Guidelines (100 Total Points)
Coding rules, organization, and aesthetics (20 points). Effective use of Go modules and idiomatic Go. Code should be readable, easy to understand. Variable and function names should be meaningful, specific rather than abstract. They should not be too long or too short. Avoid useless temporary variables and intermediate results. Code blocks and line breaks should be clean and consistent. Break large code blocks into smaller blocks that accomplish one task at a time. Utilize readable and easy-to-follow control flow (if/else blocks and for loops). Distribute the not rather than the switch (and/or) in complex Boolean expressions. Programs should be self- documenting, with comments explaining the logic behind the code (McConnell 2004, 777–817).
Testing and software metrics (20 points). Employ unit tests of critical components, generating synthetic test data when appropriate. Generate program logs and profiles when appropriate. Monitor memory and processing requirements of code components and the entire program. If noted in the requirements definition, conduct a Monte Carlo performance benchmark.
Design and development (20 points). Employ a clean, efficient, and easy-to-understand design that meets all aspects of the requirements definition and serves the use case. When possible, develop general-purpose code modules that can be reused in other programming projects.
Documentation (20 points). Effective use of Git/GitHub, including a README.md Markdown file for each repository, noting the roles of programs and data and explaining how to test and use the application.
Application (20 points). Provide instructions for creating an executable load module or application (.exe file for Submit
(https://canvas.northwestern.edu/courses/205363/modules/items/2870864) (https://canvas.northwestern.edu/courses
Windows or .app file for MacOS). The application should run to completion without issues. If user input is
Assignment
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1/19/24, 12:40 AM Week 3 Assignment: Testing Go for Statistics (Winter 2024)
required, the application should check for valid/usable input and should provide appropriate explanation to users who provide incorrect input. The application should employ clean design for the user experience and user interface (UX/UI).
Assignment Deliverables
Include the web address text (URL) for the GitHub repository in the comments form of the assignment posting.
README.md Markdown text file documentation for the assignment
Programs, Data, and Documentation
miller_mtpa_chapter_1_and_bibliography_sample.pdf (https://canvas.northwestern.edu/courses/205363/files/17943544?wrap=1) (https://canvas.northwestern.edu/courses/205363/files/17943544/download?download_frd=1)
miller-mtpa-chapter-1-program.py (https://canvas.northwestern.edu/courses/205363/files/17943508?wrap=1) (https://canvas.northwestern.edu/courses/205363/files/17943508/download?download_frd=1) (ingore the matplotlib plotting as that is not critical to the test)
miller-mtpa-chapter-1-program.R (https://canvas.northwestern.edu/courses/205363/files/17943502?wrap=1) (https://canvas.northwestern.edu/courses/205363/files/17943502/download?download_frd=1)
References
Anscombe, F. J. 1973, February. “Graphs in Statistical Analysis.” The American Statistician 27(1): 17–21. Available online at https://www.sjsu.edu/faculty/gerstman/StatPrimer/anscombe1973.pdf (https://www.sjsu.edu/faculty/gerstman/StatPrimer/anscombe1973.pdf)
Bates, Mark, and Cory LanNou. 2023. Go Fundamentals. Boston: Addison-Wesley. [978-0-13-791830-0] Chapter 7, Testing, pages 195–229.
Bodner, Jon. 2021.Learning Go: An Idiomatic Approach to Real-World Go Programming. Sebastopol, CA: O’Reilly. [ISBN-13: 978-1-432-07721-3] Book website at https://learning-go-book.dev/ (https://learning-go- book.dev/) GitHub code repository at https://github.com/learning-go-book (https://github.com/learning-go- book) Chapter 13, Writing Tests. pages 271–297. Also, check out Bodner’s test examples on GitHub: https://github.com/learning-go-book/test_examples (https://github.com/learning-go-book/test_examples) James, Chris. 2023. Learn Go with Tests. GitBook available online at https://quii.gitbook.io/learn-go-with- tests/ (https://quii.gitbook.io/learn-go-with-tests/)
McConnell, Steve. 2004. Code Complete: A Practical Handbook of Software Construction (second edition). Redmond, WA: Microsoft Press [ISBN-13: 978-0-7356-1967-8] Chapter 32, Self-Documenting Code, pages 777– 817. Available on Course Reserves.
Miller, Thomas W. 2015. Modeling Techniques in Predictive Analytics with Python and R: A Guide to Data Science. Upper Saddle River, NJ: Pearson Education. [ISBN-13: 978-0-13-389206-2] Chapter 1 Analytics and Data Science, pages 1–32, includes discussion and analysis of The Anscombe Quartet. Python and R programs available at https://github.com/mtpa/mtpa/tree/master/MTPA_Chapter_1 (https://github.com/mtpa/mtpa/tree/master/MTPA_Chapter_1)
Simion, Adelina. 2023. Test-Driven Development in Go: A Practical Guide to Writing Idiomatic and Efficient Go Tests Through Real-World Examples. Birmingham, UK: Packt. [ISBN-13: 978-1803247878] Chapter 1, Getting to Grips with Test-Driven Development (pages 3–25) and Chapter 2, Unit Testing Essentials (pages 27–63). Available on Course Reserves.
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1/19/24, 12:40 AM Week 3 Assignment: Testing Go for Statistics (Winter 2024)
Programming Assignment Rubric
Criteria Ratings Pts
Coding rules, organization, and aesthetics
view longer description
20 pts Outstanding
The learner satisfies all criteria of this type.
15 pts Meets Expectation s
The learner satisfies most criteria of this type.
10 pts Needs Improvemen t
Many criteria of this type are not met.
5 pts Partially Acceptable
Most criteria of this type are not met.
0 pts Unacceptabl e
No submission or no criteria met.
Testing and software metrics
view longer description
20 pts Outstanding
The learner satisfies all criteria of this type.
15 pts Meets Expectation s
The learner satisfies most criteria of this type.
10 pts Needs Improvemen t
Many criteria of this type are not met.
5 pts Partially Acceptable
Most criteria of this type are not met.
0 pts Unacceptabl e
No submission or no criteria met.
Design and development
view longer description
20 pts Outstanding
The learner satisfies all criteria of this type.
15 pts Meets Expectation s
The learner satisfies most criteria of this type.
10 pts Needs Improvemen t
Many criteria of this type are not met.
5 pts Partially Acceptable
Most criteria of this type are not met.
0 pts Unacceptabl e
No submission or no criteria met.
Documentation
view longer description
20 pts Outstanding
The learner satisfies all criteria of this type.
15 pts Meets Expectation s
The learner satisfies most criteria of this type.
10 pts Needs Improvemen t
Many criteria of this type are not met.
5 pts Partially Acceptable
Most criteria of this type are not met.
0 pts Unacceptabl e
No submission or no criteria met.
Application
view longer description
20 pts Outstanding
The learner satisfies all criteria of this type.
15 pts Meets Expectation s
The learner satisfies most criteria of this type.
10 pts Needs Improvemen t
Many criteria of this type are not met.
5 pts Partially Acceptable
Most criteria of this type are not met.
0 pts Unacceptabl e
No submission or no criteria met.
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