EGR 103/Lecture03

The following is a list of the commands from the help sections covered in Lecture 3 that are required knowledge for EGR 103 students. The scripts from class can be obtained with the commands

wget people.duke.edu/~mrg/EGR103public/Lec3Files.tar
tar -xvf Lec3Files.tar

help elmat

• Elementary matrices
  • now: zeros, ones, eye, linspace, logspace, :
  • later in the course: meshgrid
• Basic array information
  • now: size, length, numel
  • later: disp
• Matrix manipulation
  • now: :, end
  • later: reshape, find
• Special variables and constants
  • now: eps, realmax, realmin, pi, i, inf, nan, j, why

help elfun

• Trigonometric
  • now: all -- note ending "d" for some to use degrees versus default of radians
• Exponential
  • now: exp, log, log10, sqrt
• Complex
  • now: abs
  • later: angle, conj, imag, real
• Rounding and remainder
  • now: all

help randfun

• Random matrices
  • now: rand, randi, randn

help general

• General information
  • now: logo, membrance, bench
• Managing the workspace
  • now: who, whos, clear, quit, exit
  • later: load, save
• Controlling the command window
  • now: format
  • later: echo, diary

help datafun

• Basic operations
  • now: max, min, mean, median, mode, sort, sortrows, sum
  • later: std, var, hist, trapz, cumsum, cumtrapz

help ops

• Arithmetic operators
  • now: + - * .* / ./ ^ .^
  • later: \ .\
• Relational operators
  • later: all
• Logical operators
  • later: all
• Special characters:
  • now: : [] % ' , ;
  • later: @