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

Toni Caktas
Toni Caktas
16,478 Points

task 2

I am not geting by task 2

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.TMAX) / 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

Alexander Nikiforov
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points

Do you see how .style('fill', function(d) { is done:

        .style('fill', function(d) {
            year = d.DATE.substring(0,4)
            if (year === "1973") {
                return "blue"
            }
            else {
                return "#ff00f5"
            }
        });

It does exactly what you need in Task 2 but for fill : changing the colors for year 1973 be blue, and for the others to be "#ff00f5"

Simply replace the .style('stroke', 'red') with the code from style('fill', function(d)) ...

Sounds reasonable ?