STA/OPR 9750 - Week 11

Michael Weylandt

STA/OPR 9750 Mini-Project #03

I spot-checked several results - look fantastic!

• Fewer git questions - folks getting the hang of things!
• Peer feedback assigned via GitHub
  • You give comments on other students’ repos
  • Due in 1 week

Pay attention to the rubric

STA/OPR 9750 Mini-Project #04

MP#04 released today

• Due 2024-12-04 (\(\approx\) 3 weeks)
• Topic: financial modeling
  • Comparison of two retirement plans
  • Historical data + Monte Carlo (“bootstrapping”)
• Format:
  • Decision Analytics - Play the role of financial advisor
  • GitHub post AND Brightspace submission

Week 11 Pre-Assignment

Due at midnight tonight - take a moment to do it now if you haven’t already!

Going Forward

Pre-Assignments

Brightspace - Wednesdays at 11:45

• Reading, typically on course website
• Brightspace auto-grades
  • I have to manually change to completion grading

Next pre-assignment is November 20th

Thank you for FAQs and (honest) team feedback. Keep it coming!

Grading

We owe you:

• MP#02 final average (Need to upload to BS)
• MP#02 peer meta-review (Need to upload to BS)
• Posting videos to Vocat (Need to do video splitting)
• Mid-Term Check-In Feedback

Course Support

• Synchronous
  • Office Hours 4x / week
    • MW Office Hours on Monday + Thursday
    • CR Tuesday + Friday
    • No OH during Thanksgiving break
• Asynchronous
  • Piazza (\(38\) minute average response time)

Change: MW Thursday Zoom OH now 4:00pm to 5:00pm

Upcoming

Nov 20:

• MP#03 Peer Feedback
• Pre Assignment

Nov 27 - Thanksgiving Holiday (No Class on Nov 28)

• Check-In Peer Feedback (Vocat)

Pre-Assignment #09 FAQs

FAQ: HTML vs CSS

What is the difference between HTML and CSS?

HTML is substance; CSS is style

Distinction can be a bit blurry & CSS can live “inside” HTML

Example

FAQ: a in SelectorGadget

Why does [SelectorGadget] display “a” in the selector when selecting a web link?

a is for anchor.

Confusingly, anchors are both links and destinations.

Anchors can reference:

• Another page (http://URL)
• A particular part of another page (http://URL#place)
• A particular part of the same page (#place)

Quarto supports cross-linking with anchors

FAQ: SelectorGadget - Multiple Clicks

Why does SelectorGadget go “unique” when I click multiple elements of interest?

Can’t find a common structure:

• Typically a problem within lists or common element types

FAQ: Selectors - Nesting

How to avoid unwanted elements such as headers or sidebars, focusing only on the main content I need?

Nest your selectors!

thing1 thing2 will select only thing2s inside a thing1

StarWars page

Try main h2

FAQ: Relationship to Markdown

Is [HTML] similar to Markdown ?

Markdown is an easier way to write (a subset of) HTML

Name is a bad joke: Markup (M in HTML) vs Markdown

HTML can (theoretically) do more, but painful to write by hand

FAQ: Messy HTML

How can we target data with CSS Selectors in messy HTML?

Pain and suffering - depends how messy.

Worst case: a little bit of HTML selection + text processing (next week)

Peer Advice

Selected Peer Advice:

• More effort into writing, motivation, and formatting (several)
• Be sure to push image files in addition to qmd
• Code-folding!
• Learning style for more experienced peers
• More charts
• setNames to improve table formatting. (MW: I prefer rename YMMV)
• Table of contents
• Be selective in outputs

My Advice

• Most effort \(\neq\) most important

• Reader knows less and cares less than you think

• Summary / Abstract goes a long way

• Cross-linking useful

• Use suggested file names

• “What have you tried?”

• Help me help you

• Print less

Today

Agenda

• Review of HTML / CSS Structure
• Pre-Assignment Examples
  • Star Wars
  • CUNY Table
  • Baruch GPS
• Exercise
  • CUNY Map
  • Cocktails (Part 1)

HTML Review

• HTML Structure
• CSS Selectors (SelectorGadget)
• Introduction rvest

Pre-Assignment Exercises

• Star Wars

main h2

• CUNY Table

table or tbody

• Baruch GPS

.geo

Exercise 1: CUNY Map

Recall Lab 1. Goal: extend map to all CUNYs

Steps:

1. Read CUNY table and extract links
2. Follow links and pull coordinates
   • To read geo class, use this:

COORDS <- html_element(".geo") |> html_text() |> str_split_1(";")
LAT <- as.numeric(COORDS[1])
LON <- as.numeric(COORDS[2])

3. Adapt Lab 1 leaflet to show all locations

Breakout Rooms

Order	Team		Order	Team
1	Rat Pack		6	Ca$h VZ
2	Subway Surfers		7	Listing Legends
3	Chart Toppers		8	TDSSG
4	Metro Mindset		9	Broker T’s
5	Apple Watch		10	EVengers

Exercise 2: Cocktails

Goal: create a cocktail data frame from Hadley’s Recipies

Today: - How to find them all? - How to extract individual recepies? - How to pull items from each recipie?

Next time: - How to convert text to numeric values + column info - Data wrangling