Average Tuition Over Time

A scatter plot showing the average cost of tuition for one year of college over time (adjusted for inflation to 2016 dollars). Data from College Board.

Forked from curran's block: Scatter Plot with Time Axis.

Additional code borrowed from curran's block: Stylized Scatter Plot with Color Legend

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3-legend/2.13.0/d3-legend.js"></script>

<title>Tuition Visualization</title>
    <style>
      body {
        margin: 0px;
      }
      .domain {
        display: none;
      }
      .tick line {
        stroke: gray;
      }
      .tick text{
        fill: green;
        font-size: 12pt;
        font-family: sans-serif;
      }
      .axis-label{
        fill: gray;
        font-size: 26pt;
        font-family: sans-serif;
      }
      .legend-label{
        fill: gray;
        font-size: 20pt;
        font-family: sans-serif;
      }
      .legendCells text{
        fill: gray;
        font-size: 16pt;
        font-family: sans-serif;
      }
    </style>
  </head>
  <body>
    <svg width="900" height="500"></svg>
    <script>
      
      const xValue = d => d.year;
      const yValue = d => d.tuition;
      const xLabel = 'Year'
      const yLabel = 'Tuition in 2016 Dollars';
      const colorValue = d => d.type;
      const colorLabel = 'Type of School';
      const margin = { left: 150, right: 300, top: 20, bottom: 120 };

const svg = d3.select('svg');
      const width = svg.attr('width');
      const height = svg.attr('height');
      const innerWidth = width - margin.left - margin.right;
      const innerHeight = height - margin.top - margin.bottom;

xAxisG.append('text')
          .attr('class', 'axis-label')
          .attr('x', innerWidth / 2)
          .attr('y', 100)
          .text(xLabel);

yAxisG.append('text')
          .attr('class', 'axis-label')
          .attr('x', -innerHeight / 2)
          .attr('y', -100)
          .attr('transform', `rotate(-90)`)
          .style('text-anchor', 'middle')
          .text(yLabel);

const colorLegendG = g.append('g')
          .attr('transform', `translate(${innerWidth + 60}, 180)`);
      
      const xScale = d3.scaleTime();
      const yScale = d3.scaleLinear();
      const colorScale = d3.scaleOrdinal()
        .range(d3.schemeCategory10);

const xAxis = d3.axisBottom()
        .scale(xScale)
        .tickPadding(15)
        .tickSize(-innerHeight);

const yAxis = d3.axisLeft()
        .scale(yScale)
        .ticks(5)
        .tickPadding(15)
        .tickSize(-innerWidth);   
      
      colorLegendG.append('text')
          .attr('class', 'legend-label')
          .attr('x', -30)
          .attr('y', -40)
          .text(colorLabel);
      
      const colorLegend = d3.legendColor()
        .scale(colorScale)
        .shape('circle');
      
      const row = d => {
        d.year = new Date(d.year);
        d.tuition = +d.tuition;
        return d;
      };
      
     	d3.csv('tuition2.csv', row, data => {
        xScale
          .domain(d3.extent(data, xValue))
          .range([0, innerWidth])
          .nice();

yScale
          .domain(d3.extent(data, yValue))
          .range([innerHeight, 0])
          .nice();

g.selectAll('circle').data(data)
          .enter().append('circle')
            .attr('cx', d => xScale(xValue(d)))
            .attr('cy', d => yScale(yValue(d)))
        		.attr('fill', d => colorScale(colorValue(d)))
            .attr('fill-opacity', 0.6)
            .attr('r', 8);

xAxisG.call(xAxis);
        yAxisG.call(yAxis);
        colorLegendG.call(colorLegend)
         .selectAll('.cell text')
           .attr('dy', '0.1em');
      });
        
    </script>
  </body>
</html>

https://d3js.org/d3.v4.min.js

https://cdnjs.cloudflare.com/ajax/libs/d3-legend/2.13.0/d3-legend.js