Line Chart - Income

This visualization is a line chart tracking average income across the various levels of maximum attained education.

Data Source: Table 2A of What It's Worth: FIeld of Training and Economic Status, US Census Bureau, Survey of Income and Program Participation, 2008 Panel.

Visualization modified from d3noobs scatterplot example.

Built with blockbuilder.org

<!DOCTYPE html>
<meta charset="utf-8">
<style> /* set the CSS */

.line {
  fill: none;
  stroke: black;
  stroke-width: 2px;
}

</style>
<body>

<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

// set the dimensions and margins of the graph
var margin = {top: 20, right: 20, bottom: 30, left: 60},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

//color dots
var color = d3.scaleOrdinal(d3.schemeCategory10);  
  
// set the ranges
var x = d3.scaleBand().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);

// define the line
var valueline = d3.line()
    .x(function(d) { return x(d.Education); })
    .y(function(d) { return y(d.Average); });

// append the svg obgect to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform",
          "translate(" + margin.left + "," + margin.top + ")");

// Get the data
d3.csv("Table 2A.csv", function(error, data) {
  if (error) throw error;

// format the data
  data.forEach(function(d) {
      d.Education = (d.Education);
      d.Average = +d.Average;
  });

// Scale the range of the data
  x.domain(data.map(function(d) { return d.Education; }));
  y.domain([0, d3.max(data, function(d) { return d.Average; })]);

// Add the valueline path.
  svg.append("path")
      .data([data])
      .attr("class", "line")
      .attr("d", valueline);
      
  // Add the scatterplot
  svg.selectAll("dot")
      .data(data)
    .enter().append("circle")
      .attr("r", 4)
      .attr("cx", function(d) { return x(d.Education); })
      .attr("cy", function(d) { return y(d.Average); })
  		.style("fill", function(d) {return color(d.Education);});

// Add the X Axis
  svg.append("g")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x));

// Add the Y Axis
  svg.append("g")
      .call(d3.axisLeft(y))
  		.append("text")
    		.attr("x", 0 - (height / 2))
    		.attr("y", 15 - margin.left)
      	.attr("dy", "0.32em")
      	.attr("fill", "#000")
      	.attr("font-weight", "bold")
      	.attr("text-anchor", "middle")
    		.attr("transform", "rotate(-90)")
      	.text("Average Income $");

});

</script>
</body>

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