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JavaScript D3.js Data Binding with D3.js Data Binding

Jorge Montava Arsis
Jorge Montava Arsis
1,648 Points
Posted by Jorge Montava Arsis
Jorge Montava Arsis
1,648 Points

Change the stroke color when a different year by setting a function to it..

// height and width of the svg var height = 800, width = 500;

var padding = 50;

var viz = d3.select("#viz-wrapper") .append('svg') .attr('id', 'viz') .attr('height', height) .attr('width', width);

d3.csv('app/climate_data_truncated.csv', function(data) {

dots = viz.selectAll('circle')
    .data(data)
    .enter()
    .append('circle');

dots.attr('r', function(d) {return Math.abs(d.TMIN) / 10})
    .attr('cx', function(d) {return Math.max(0 + padding, Math.random() * width - padding)})
    .attr('cy', function(d) {return Math.max(0 + padding, Math.random() * height - padding )})
    .style('stroke', 'red')
    .style('fill', function(d)
    {
        year = d.DATE.substring(0,4)
        if (year === "1973") {
            return "blue"
        }
        else {
            return "#ff00f5"
        }
    });

});

js/app.js 
// height and width of the svg
var height = 800, width = 500;

var padding = 50;

var viz = d3.select("#viz-wrapper")
    .append('svg')
    .attr('id', 'viz')
    .attr('height', height)
    .attr('width', width);

d3.csv('app/climate_data_truncated.csv', function(data) {

    dots = viz.selectAll('circle')
        .data(data)
        .enter()
        .append('circle');

    dots.attr('r', function(d) {return Math.abs(d.TMIN) / 10})
        .attr('cx', function(d) {return Math.max(0 + padding, Math.random() * width - padding)})
        .attr('cy', function(d) {return Math.max(0 + padding, Math.random() * height - padding )})
        .style('stroke', 'red')
        .style('fill', function(d)
        {
            year = d.DATE.substring(0,4)
            if (year === "1973") {
                return "blue"
            }
            else {
                return "#ff00f5"
            }
        });
});
index.html 
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Requests</title>
  </head>
  <body>
    <div id="viz-wrapper">
    </div>
  </body>
  <script src="js/d3.min.js" charset="utf-8"></script>
  <script src="js/app.js" charset="utf-8"></script>
</html>

1 Answer

Steven Parker
Steven Parker
229,744 Points
Steven Parker
Steven Parker
229,744 Points

The provided code already does this for the "fill". So using that for an example, it should be reasonably easy to modify the "stroke" to do something similar. You can match the fill colors if you want, or you can use totally different colors if you like.