D3js Programming Examples

Online D3JS Editor

d3js

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

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

.area {
  fill: url(#area-gradient);					
  stroke-width: 0px;
}

.grid .tick {
    stroke: black;
    opacity: 0.7;
    stroke-dasharray: 5,5;
}
.grid path {
      stroke-width: 3;
}

</style>
<body>

<!-- load the d3.js library -->    	
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

function make_x_axis() {        
    return d3.svg.axis()
         .scale(x)
         .orient("bottom")
         .ticks(5)
         .tickSize(-width, 0, 0)
         .tickFormat("")
}

function make_y_axis() {        
    return d3.svg.axis()
        .scale(y)
        .orient("left")
        .ticks(5)
}
// set the dimensions and margins of the graph
var margin = {top: 20, right: 20, bottom: 30, left: 50},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

// parse the date / time
var parseTime = d3.timeParse("%d-%b-%y");

// set the ranges
var x = d3.scaleTime().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);

// define the area
var area = d3.area()
    .x(function(d) { return x(d.date); })
    .y0(height)
    .y1(function(d) { return y(d.close); });

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

// 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("https://hyllesen.github.io/test.csv", function(error, data) {
  if (error) throw error;

  // format the data
  data.forEach(function(d) {
      d.date = parseTime(d.date);
      d.close = +d.close;
  });

  // scale the range of the data
  x.domain(d3.extent(data, function(d) { return d.date; }));
  y.domain([0, d3.max(data, function(d) { return d.close; })]);
  
  // set the gradient
  svg.append("linearGradient")				
    .attr("id", "area-gradient")			
    .attr("gradientUnits", "userSpaceOnUse")	
    .attr("x1", 0).attr("y1", y(0))			
    .attr("x2", 0).attr("y2", y(1000))		
  .selectAll("stop")						
    .data([								
      {offset: "0%", color: "#278CCB"},		
      {offset: "80%", color: "#365C71"}
    ])					
  .enter().append("stop")			
    .attr("offset", function(d) { return d.offset; })	
    .attr("stop-color", function(d) { return d.color; });

  // add the area
    svg.append("path")
       .data([data])
       .attr("class", "area")
       .attr("d", area);

  // add the valueline path.
  svg.append("path")
      .data([data])
      .attr("class", "line")
      .attr("d", valueline);
      
    

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

  // add the Y Axis
  svg.append("g")
  .attr("class", "grid")
        .call(d3.axisLeft(y)
        .tickSize(-width, 0, 0)
            
        );
      
});

</script>
</body>

drduhy

d3js

<!-- source is https://bl.ocks.org/mbostock/4060366 -->
<!DOCTYPE html>
<htm>
<meta charset="utf-8">
<style>

.links {
  stroke: #000;
  stroke-opacity: 0.2;
}

.polygons {
  fill: none;
  stroke: #000;
}

.polygons :first-child {
  fill: #f00;
}

.sites {
  fill: #000;
  stroke: #fff;
}

.sites :first-child {
  fill: #fff;
}

</style>
<body>
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

var svg = d3.select("svg").on("touchmove mousemove", moved),
    width = +svg.attr("width"),
    height = +svg.attr("height");

var sites = d3.range(100)
    .map(function(d) { return [Math.random() * width, Math.random() * height]; });

var voronoi = d3.voronoi()
    .extent([[-1, -1], [width + 1, height + 1]]);

var polygon = svg.append("g")
    .attr("class", "polygons")
  .selectAll("path")
  .data(voronoi.polygons(sites))
  .enter().append("path")
    .call(redrawPolygon);

var link = svg.append("g")
    .attr("class", "links")
  .selectAll("line")
  .data(voronoi.links(sites))
  .enter().append("line")
    .call(redrawLink);

var site = svg.append("g")
    .attr("class", "sites")
  .selectAll("circle")
  .data(sites)
  .enter().append("circle")
    .attr("r", 2.5)
    .call(redrawSite);

function moved() {
  sites[0] = d3.mouse(this);
  redraw();
}

function redraw() {
  var diagram = voronoi(sites);
  polygon = polygon.data(diagram.polygons()).call(redrawPolygon);
  link = link.data(diagram.links()), link.exit().remove();
  link = link.enter().append("line").merge(link).call(redrawLink);
  site = site.data(sites).call(redrawSite);
}

function redrawPolygon(polygon) {
  polygon
      .attr("d", function(d) { return d ? "M" + d.join("L") + "Z" : null; });
}

function redrawLink(link) {
  link
      .attr("x1", function(d) { return d.source[0]; })
      .attr("y1", function(d) { return d.source[1]; })
      .attr("x2", function(d) { return d.target[0]; })
      .attr("y2", function(d) { return d.target[1]; });
}

function redrawSite(site) {
  site
      .attr("cx", function(d) { return d[0]; })
      .attr("cy", function(d) { return d[1]; });
}

</script>
</body>
</html>

rety

d3js

<!-- source is https://bl.ocks.org/mbostock/4060366 -->
<!DOCTYPE html>
<htm>
<meta charset="utf-8">
<style>

.links {
  stroke: #000;
  stroke-opacity: 0.2;
}

.polygons {
  fill: none;
  stroke: #000;
}

.polygons :first-child {
  fill: #f00;
}

.sites {
  fill: #000;
  stroke: #fff;
}

.sites :first-child {
  fill: #fff;
}

</style>
<body>
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

var svg = d3.select("svg").on("touchmove mousemove", moved),
    width = +svg.attr("width"),
    height = +svg.attr("height");

var sites = d3.range(100)
    .map(function(d) { return [Math.random() * width, Math.random() * height]; });

var voronoi = d3.voronoi()
    .extent([[-1, -1], [width + 1, height + 1]]);

var polygon = svg.append("g")
    .attr("class", "polygons")
  .selectAll("path")
  .data(voronoi.polygons(sites))
  .enter().append("path")
    .call(redrawPolygon);

var link = svg.append("g")
    .attr("class", "links")
  .selectAll("line")
  .data(voronoi.links(sites))
  .enter().append("line")
    .call(redrawLink);

var site = svg.append("g")
    .attr("class", "sites")
  .selectAll("circle")
  .data(sites)
  .enter().append("circle")
    .attr("r", 2.5)
    .call(redrawSite);

function moved() {
  sites[0] = d3.mouse(this);
  redraw();
}

function redraw() {
  var diagram = voronoi(sites);
  polygon = polygon.data(diagram.polygons()).call(redrawPolygon);
  link = link.data(diagram.links()), link.exit().remove();
  link = link.enter().append("line").merge(link).call(redrawLink);
  site = site.data(sites).call(redrawSite);
}

function redrawPolygon(polygon) {
  polygon
      .attr("d", function(d) { return d ? "M" + d.join("L") + "Z" : null; });
}

function redrawLink(link) {
  link
      .attr("x1", function(d) { return d.source[0]; })
      .attr("y1", function(d) { return d.source[1]; })
      .attr("x2", function(d) { return d.target[0]; })
      .attr("y2", function(d) { return d.target[1]; });
}

function redrawSite(site) {
  site
      .attr("cx", function(d) { return d[0]; })
      .attr("cy", function(d) { return d[1]; });
}

</script>
</body>
</html>

Online D3JS Editor

drduhy

rety

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