SUNY Geneseo Department of Computer Science

Matrices

Wednesday, February 26

CSci 120, Spring 2014
Prof. Doug Baldwin

Return to List of Lectures

Previous Lecture

Misc

Problems with Edinburgh videos

Hopefully server problems that will be fixed
Mathworks tutorials can substitute for Edinburgh

Hour exam 1 is Friday (Feb. 28)

Covers material through matrices (lessons 1 through 6, e.g., expressions, variables, vectors, scripts, plotting, matrices, etc.)
In class, full class time
3 - 5 short-answer questions (e.g., write fragments of Matlab code, tell me what fragments of Matlab code do, etc; 10-15 minutes per answer)
Open reference materials (book, notes, computer) but closed person
- “Open computer” includes Matlab
Practice by solving small problems

Programming project 1

3D plotting
Handout
I hope to use programming projects in a study of how well the “flipped” teaching works, separate from regular grades.
- Anonymous scoring against course learning outcomes by me, grading against assignment-specific criteria by TAs
- Consent form

Questions?

Quiz 3

Solution

    A = [ 1 3; 6 4; 2 5 ]
    A =
        1     3
        6     4
        2     5
        
    % : notation (or vectors generally) in subscripts picks out sub-matrix
    A( 2:3, 2 )
    ans =
        4
        5

    % "max" and similar functions work along columns when applied to matrices
    max(A)
    ans =
        6     5

Matrices Lesson

(After exam)

“For” loops, with application to integration by Riemann sums

Read / watch

Chapter 5 up to but not including section 5.2.1 of Attaway
- Top of page 147 through top 1/3 of 160
“The for loop” from Edinburgh
“Programming introduction” and “For loops” sections (under “Programming”) in the “Logic and Control Flow” chapter from Mathworks tutorials.
Khan Academy lectures on Riemann sums: 4 of the 5 lectures beginning with “Simple Riemann appoximation using rectangles” at https://www.khanacademy.org/math/calculus/integral-calculus/riemann-sums/v/simple-riemann-approximation-using-rectangles (skip “Trapezoidal approximation of area under curve”)
My mini-lecture on designing and testing programs, at https://cloud.ensemblevideo.com/app/sites/index.aspx?destinationID=IlO-D-b-vUWVkAsj2Is5Z

Next Lecture