D3 Homework - Data Journalism and D3

Purpose

• The purpose of this assignment was to use the data set from US Census to invesitigate rates of income, obesity, poverty, etc. by state to build a scatterplot
• The dataset: https://factfinder.census.gov/faces/nav/jsf/pages/searchresults.xhtml](https://factfinder.census.gov/faces/nav/jsf/pages/searchresults.xhtml

Key Skills

• JavaScript
• D3.js
• D3.js interactive visualization
• tooltips

Step 1 - Create a Skeleton

• Before attempting to plot, I first load in the csv and did a console.log to make sure I correctly loaded the csv Note: You'll need to use python -m http.server to run the visualization. This will host the page at localhost:8000 in your web browser.
• Next, I made sure that my margins were appropriate so that I can properly do a scatterplot
• This assignment had two parts - main assignment and bonus assignment. I first did the main assignment to make sure that I could get the most basic scatter plot.

Step 2 - Plot basic scatterplot

• The main assigment required to create a scatter plot between two of the data variables such as Healthcare vs. Poverty or Smokers vs. Age.
• Once the scatter plot was created, I added a state abbreviations to each circle.

 var circleText = chartGroup.selectAll()
    .data(data)
    .enter()
    .append("text")
    .text(d => d.abbr)
    .attr("x", d => xLinearScale(d[xProperty])) 
    .attr("y", d => yLinearScale(d[yProperty])) 
    .attr("class", "stateText") 
    .attr("font-size", "9");

Step 3 - Bonus

• The bonus portion required additional variables and tooltip with interactions.