EGR 103/Concept List Fall 2019

This page will be used to keep track of the commands and major concepts for each lab in EGR 103.

Lectures

• Lecture 1 - Introduction
  • Class web page: EGR 103L; assignments, contact info, readings, etc - see slides on Errata/Notes page
  • Sakai page: Sakai 103L page; grades, surveys and tests, some assignment submissions
  • Piazza page: Piazza 103L page; message board for questions
• Lecture 2 - Programs and Programming
  • To play with Python:
    • Install it on your machine or a public machine: Download
    • Use a Duke container with Spyder: Containers - note - these do not have access to your Duke files. More on how to connect that later.
  • Quick tour of Python
    • Editing window, variable explorer, and console
    • Variable explorer is your friend
  • From Dewey - programming language typically have ability to work with input, output, math, conditional execution, and repetition
  • Hilton and Bracy Seven Steps
  • Class work developing algorithm for program to determine if a number is prime
• Lecture 3
  • 7 Steps for finding prime numbers
  • prime program -- includes intro to input(), if tree, for loop, print(), remainder %
• Lecture 4
  • Function definitions
    • Positional and key word arguments (kwargs)
    • Default values
    • Returns tuples -- can be received by a single item or a tuple of the right size
  • Aquarium
• Lecture 5
  • print() and format specifications: link
    • Main components are width, precision, and type; sometimes initial +
    • e and f can print integers as floats; d cannot print floats
  • relational and logical operators - how they work on item, string, list, tuple
  • if trees
  • while loops
  • for loops
  • counting characters program

# letter_typing.py from class:

def check_letters(phrase):
    vowels = "aeiou"
    numbers = "0123456789"
    consonants = "bcdfghjklmnpqrstvwxyz"
    # vowels, numbers, consonants, and other in that order
    count = [0, 0, 0, 0]
    
    for letter in phrase:
        if letter.lower() in vowels:
            count[0] += 1
        elif letter.lower() in numbers: # .lower not really needed here
            count[1] += 1
        elif letter.lower() in consonants:
            count[2] += 1
        else:
            count[3] += 1
            
    return count

out = check_letters("Let's go Duke University 2018!")
print(out)

• • Question in class: does Python have ++ or -- operators; it does not. You need x += 1 or x -= 1

Labs

• Lab 1
  • Unix commands: pwd, cd, ls, mkdir, wget, tar, cp, latex, dvipdf, evince, xeyes
  • Other concepts: MobaXterm, XQuartz, ssh
  • Windows permissions were covered, but were only needed during this one lab.
  • Mounting CIFS drives was covered, but will not be needed for lab 1.
  • Three parts of lab:
    • Once only ever: creating EGR 103 folder, setting Windows permissions
    • Once per lab: creating lab1 folder, wget-ting files, tar expansion, duplicate lab skeleton
    • Doing work: changing to lab1 folder; using emacs, latex, dvipsd, and evince correctly
  • Work on lab every day - at least logging in, changing directories, using (emacs, latex, dvipdf, evince)
  • Work a little at a time to help with debugging