CODEWITHSUNDEEP
javascriptd3.jsdata-visualization
jibin mathew
jibin mathew

Reputation: 752

Adding image in d3.js

I am newbie in java script and d3.js . I wanted to add images to corresponding points in the chart. I went through a lot of questions and articles, but I was not able to figure out that properly. The following is my code

<!DOCTYPE html>
<meta charset="utf-8">
<style>
.bar {
  fill: steelblue;
}
.bar:hover {
  fill: brown;
}
.axis--x path {
  display: none;
}
.line {
  fill: none;
  stroke: steelblue;
  stroke-width: 3px;
}
.circle {
  fill: steelblue;
}
.axis--y path, .axis--y line {
  fill: none;
  stroke: none;
}
</style>
<svg width="960" height="500"></svg>
<script src="http://localhost/d3.js"></script>
<script>
var svg = d3.select("svg"),
    margin = {top: 50, right: 50, bottom: 30, left: 80},
    width = +svg.attr("width") - margin.left - margin.right,
    height = +svg.attr("height") - margin.top - margin.bottom;

var x= d3.scaleLinear().rangeRound([0, width]);

    y = d3.scaleBand().range([height, 0]).padding(0.1);
var g = svg.append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.tsv("http://localhost/data1.tsv", function(d) {
  d.frequency = +d.frequency;
  return d;
}, function(error, data) {
  if (error) throw error;

  var line = d3.line()
    .x(function(d) { return x(d.frequency); })
    .y(function(d) { return y(d.letter)+30; })
    .curve(d3.curveStepAfter);

  x.domain([0, d3.max(data, function(d) { return d.frequency; })]);

  y.domain(data.map(function(d) { return d.letter; }));

  g.append("g")
      .attr("class", "axis axis--x")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x));

  g.append("g")
      .attr("class", "axis axis--y")
      .call(d3.axisLeft(y))
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", "0.71em")
      .attr("text-anchor", "end")
      .text("letter");

  g.append("path")
    .datum(data)
    .attr("class", "line")
    .attr("d", line);

});
</script>

This image is the output of the above code:

This image is the output of the above code

I want to add icons or tiny image in the lines as in the link below

This image shows how I want to add icons to my chart:

This image shows how I want to add icons to my chart

A question similar to mine is How do I display an icon at a point on a line chart using d3.js , but that is not working for me, and I want to add my custom icons too.

Upvotes: 0

Views: 5808

Answers (2)

Luke
Luke

Reputation: 517

I had a similar problem but was able to solve it.

Initially, I had a basic point style like this

   svg
      .append("g")
      .selectAll("dot")
      .data(data)
      .enter()
      .append("circle")
        .attr("cx", function(d) { return x(d.date) } )
        .attr("cy", function(d) { return y(d.value) } )
        .attr("r", 5)
        .attr("fill", "#69b3a2")

and changed to this to have an image as a point

  svg
    .append('g')
    .selectAll('dot')
    .data(data)
    .enter()
    .append('svg:image')
    .attr('xlink:href', function (d) {
      return 'paht/to/image'
    })
    .attr('x', function (d) {
      return x(d.date);
    })
    .attr('y', function (d) {
      return y(d.value);
    });

If you want to see the whole context, my chart was based on this example https://www.d3-graph-gallery.com/graph/connectedscatter_basic.html

Upvotes: 0

imacoder
imacoder

Reputation: 186

If you are looking to add images for tooltip like this example, replace circle by image by adding something like

focus.append('svg:image')
.attr({
  'xlink:href': 'test.png', 
  x: 0,
  y: 0,
  width: 10,
  height: 10
});

If looking to add images as data points, look at this example replacing dots by image as above code.

Upvotes: 3

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