DS April, Code 3 by sxywu

index.html

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js'></script>
  <script type="text/javascript" src="https://cdn.rawgit.com/gka/chroma.js/master/chroma.min.js"></script>
  <style>
  </style>
</head>

<body>
  <svg />
  <script>
    var width = 800;
    var centerSize = 100;
    var answerHeight = 200;
    var radius = 3;
    var margin = {left: 20, top: 20};
    var svg = d3.select('svg')
    	.attr('width', width)
    	.attr('height', answerHeight * 3)
    	.append('g')
    	.attr('transform', 'translate(' + [width / 2, 0] + ')');
   	var circles;
    
    // scales
    var experienceScale = d3.scaleLinear();
    var xScale = d3.scaleLinear()
    	.range([0, width / 2 - centerSize]);
   	var colorScale = chroma
    	.scale(['#e68fc3', '#7386e8', '#53c3ac']);
    // force simulation
    var simulation = d3.forceSimulation()
    	.force('x', d3.forceX().x(d => d.focusX))
      .force('y', d3.forceY().y(d => d.focusY))
//     	.force('charge', d3.forceManyBody().strength(30))
    	.force('collide', d3.forceCollide().radius(radius))
//     	.force('center', d3.forceCenter().y(0))
    	.on('tick', onTick)
    	.stop();
    
    // question
    var frustration = 'What is your biggest frustration with doing data visualization in your job?';
    var experience = 'How many years have you been doing data visualization?';
    var intended = 'Did you set out to work in data visualization or did you fall into it?';
    var question = 'What focus is data visualization in your work?';
    var answerMap = {
      'Data visualization is the focus of my job': [0, 'primary'],
      'Data visualization is an important secondary part of my job but not the focus': [1, 'secondary'],
      'Data visualization is one of several other things I do in my job but not a primary or secondary part of my role': [2, 'not focus']
    };
    var intendedMap = {
      'Ended up doing data visualization as a requirement of the job': false,
      'Intended to work in data visualization': true,
    }

    // load data
    d3.csv('survey.csv', survey => {
 			var xDomain = d3.extent(survey, d => ++d[experience]);
      experienceScale.domain(xDomain);
      
      // get the data ready
      var data = _.map(survey, (d, i) => {
        var [order, answer] = answerMap[d[question]];
        var exp = experienceScale(d[experience]);
        var frustrated = !!d[frustration];
        var focusX = (frustrated ? -1 : 1) * xScale(exp);
        focusX += (frustrated ? -1 : 1) * centerSize / 2;
        var focusY = (order + 0.5) * answerHeight;
        var intend = intendedMap[d[intended]];

        return {
          frustrated,
          intended: intend,
          answer,
          focusX,
          x: focusX,
          focusY,
          y: focusY + (intend ? -1 : 1) * _.random(centerSize / 4, centerSize / 2),
          color: colorScale(exp),
          data: d,
          id: i,
        }
      });
      
      // draw the circles
      circles = svg.selectAll('circle')
      	.data(data, d => d.id)
        .enter().append('circle')
      	.attr('r', radius)
      	.attr('fill', d => d.intended ? d.color : '#fff')
      	.attr('stroke', d => d.color)
      	.attr('stroke-width', 2);
      
      simulation.nodes(data)
      	.alpha(0.9).restart();
    });
    
    function onTick() {
      circles.attr('cx', d => d.x)
      	.attr('cy', d => d.y);
    }
    
  </script>
</body>