Popsicles

This variation of a simple bar chart adds sorting with staggered delay and translucency to improve readability during the transition. This technique is recommended by Heer & Robertson. Use the checkbox in the top right to turn sorting on or off.

forked from mbostock's block: Popsicles

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  position: relative;
  width: 960px;
}

.axis text {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.x.axis path {
  display: none;
}

label {
  position: absolute;
  top: 10px;
  right: 10px;
}

</style>
<label><input type="checkbox"> Sort values</label>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var formatPercent = d3.format(".0%");

var x = d3.scale.ordinal()
    .rangeRoundBands([0, width], .5, 1);

var y = d3.scale.linear()
    .range([height, 0]);

var color = d3.scale.ordinal().range(["#F95B34", "#EE3E64", "#F36283", "#FF9C34", "#EBDE52", "#B7D84B", "#44ACCF"]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .tickFormat(formatPercent);

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 + ")");

//SVG filter for the gooey effect
    	//Code taken from https://tympanus.net/codrops/2015/03/10/creative-gooey-effects/
    	var defs = svg.append("defs");
    	var filter = defs.append("filter").attr("id","gooeyCodeFilter");
    	filter.append("feGaussianBlur")
    		.attr("in","SourceGraphic")
    		.attr("stdDeviation","10")
    		//to fix safari: https://stackoverflow.com/questions/24295043/svg-gaussian-blur-in-safari-unexpectedly-lightens-image
    		.attr("color-interpolation-filters","sRGB") 
    		.attr("result","blur");
    	filter.append("feColorMatrix")
    		.attr("in","blur")
    		.attr("mode","matrix")
    		.attr("values","1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 18 -7")
    		.attr("result","gooey");
    	//If you want the end shapes to be exactly the same size as without the filter
    	//add the feComposite below. However this will result in a less beautiful gooey effect
    	//filter.append("feBlend")
    	//	.attr("in","SourceGraphic")
    	//	.attr("in2","gooey");
    	//Instead of the feBlend, you can do feComposite. This will also place a sharp image on top
    	//But it will result in smaller circles
    	// filter.append("feComposite") //feBlend
    	//  	.attr("in","SourceGraphic")
    	//  	.attr("in2","gooey")
    	//  	.attr("operator","atop");

d3.tsv("data.tsv", function(error, data) {

data = data.filter(function(d, i) { return i < 15; });
  data.forEach(function(d) {
    d.frequency = +d.frequency;
  });

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

svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Frequency");

svg.append('g').attr('filter', 'url(#gooeyCodeFilter)').selectAll(".bar")
      .data(data)
    .enter().append("rect")
      .attr("class", "bar")
      .attr("fill", function(d, i) { return color(i); })
      .attr("x", function(d) { return x(d.letter); })
      .attr("width", x.rangeBand())
      .attr("y", function(d) { return y(d.frequency); })
      .attr("height", function(d) { return height - y(d.frequency); });

d3.select("input").on("change", change);

var sortTimeout = setTimeout(function() {
    d3.select("input").property("checked", true).each(change);
  }, 2000);

function change() {
    clearTimeout(sortTimeout);

// Copy-on-write since tweens are evaluated after a delay.
    var x0 = x.domain(data.sort(this.checked
        ? function(a, b) { return b.frequency - a.frequency; }
        : function(a, b) { return d3.ascending(a.letter, b.letter); })
        .map(function(d) { return d.letter; }))
        .copy();

svg.selectAll(".bar")
        .sort(function(a, b) { return x0(a.letter) - x0(b.letter); });

var transition = svg.transition().duration(750 * 2),
        delay = function(d, i) { return i * 50; };

transition.selectAll(".bar")
        .delay(delay)
        .attr("x", function(d) { return x0(d.letter); });

transition.select(".x.axis")
        .call(xAxis)
      .selectAll("g")
        .delay(delay);
  }
});

</script>

https://d3js.org/d3.v3.min.js