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Last active October 14, 2016 15:55
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Week9: Stacked Transition.
Raw
index.html
<!DOCTYPE html>
<!-- code loosely inspired by this block https://gist.github.com/mstanaland/6100713 -->
<meta charset="utf-8">
<style>
@import url(https://fonts.googleapis.com/css?family=Dosis);
@import url(https://fonts.googleapis.com/css?family=Raleway:400);
@import url(https://fonts.googleapis.com/css?family=Raleway:400italic|Poiret+One|Ubuntu|Oxygen);
@import url(https://fonts.googleapis.com/css?family=Raleway:400italic|Poiret+One|Ubuntu);
body {
font: 12px sans-serif;
padding: 50px;
margin-left: 20%;
margin-bottom:100px;
}
h2 {
margin-left: 140px;
margin-bottom: 50px;
font-family: 'Dosis', sans-serif;
font-size: 28px;
color: rgb(233, 42, 58);
}
p {
font-size: 16px;
margin-left: 20px;
font-family: 'Ubuntu', sans-serif;
}
#form {
position: relative;
right: 2px;
top: 20px;
font-size: 13px;
font-family: 'Ubuntu', sans-serif;
}
.legend {
font-size: 13px;
font-family: 'Ubuntu', sans-serif;
}
svg {
background-color: rgba(203,222,229,0.5) ;
padding-left: 25px;
margin-top: 40px;
}
.axis {
font-size: 13px;
font-family: 'Ubuntu', sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
.tooltip {
position: absolute;
z-index: 10;
opacity: 1;
}
.tooltip p {
width: initial;
font-family: "Open Sans", sans-serif;
line-height: 1.4;
color: black;
font-size: 13px;
background-color: rgba(255,255,255,0.8);
border: rgba(230,230,230,1) 1px solid;
padding: 5px 7px 5px 7px;
border-radius: 10px;
}
</style>
<body>
<h2>An estimation of major religious group</h2>
<p>This Stacked bars illustrate estimated religion by top 5 countries in 2010.</p>
<p>Source: A report of the Global Religious Landscape from <a href="http://www.pewforum.org/2012/12/18/global-religious-landscape-exec/">Pew Research Center.</a></p>
<div id="form">
<label><input type="radio" name="mode" value="bycount" checked>Raw Count</label>
<label><input type="radio" name="mode" value="bypercent">As Percent of Religion</label>
</div>
<div id="chart"></div>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script>
<script>
var currentMode = "bycount";
var fullwidth = 700, fullheight = 530;
var margin = {top: 20, right: 150, bottom: 50, left: 40},
width = fullwidth - margin.left - margin.right,
height = fullheight - margin.top - margin.bottom;
var xScale = d3.scale.ordinal()
.rangeRoundBands([0, width], .6);
var yScale = d3.scale.linear()
.rangeRound([height, 0]);
var color = d3.scale.category20();
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
.innerTickSize([0]);
var yAxis = d3.svg.axis()
.scale(yScale)
.orient("left")
.ticks(11)
.tickFormat(d3.format(".2s")); // for the stacked totals version
var stack = d3.layout
.stack(); // default view is "zero" for the count display.
var svg = d3.select("#chart").append("svg")
.attr("width", fullwidth)
.attr("height", fullheight)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var tooltip = d3.select("body").append("div").attr("class", "tooltip");
d3.csv("religion.csv", function(error, data) {
if (error) {
console.log(error);
}
data.sort(function(a, b) {return d3.ascending(a.Country,b.Country);});
// how would we sort by largest total bar? what would we have to calculate?
var religions = ["Christian","Muslim","Unaffiliated","Hindu",
"Buddhist","Folk_Religions","Other_Religions","Jewish"];
color.domain(religions);
xScale.domain(data.map(function(d) { return d.Country; }));
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.attr("dy", "1em")
.attr("transform", "rotate(-30)")
.style("text-anchor", "end");
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("people");
transitionCount(); // this will use the by-count stack, and make the data, and draw.
drawLegend();
d3.selectAll("input").on("change", handleFormClick);
// All the functions for stuff above!
function handleFormClick() {
if (this.value === "bypercent") {
currentMode = "bypercent";
transitionPercent();
} else {
currentMode = "bycount";
transitionCount();
}
}
function makeData(religions, data) {
return religions.map(function(religion) {
return data.map(function(d) {
return {x: d.Country, y: +d[religion], religion: religion};
})
});
}
function transitionPercent() {
yAxis.tickFormat(d3.format("%"));
stack.offset("expand"); // use this to get it to be relative/normalized!
var stacked = stack(makeData(religions, data));
// call function to do the bars, which is same across both formats.
transitionRects(stacked);
}
function transitionCount() {
yAxis.tickFormat(d3.format(".2s")); // for the stacked totals version
stack.offset("zero");
var stacked = stack(makeData(religions, data));
transitionRects(stacked);
}
function transitionRects(stacked) {
// this domain is using the last of the stacked arrays, which is the last illness, and getting the max height.
yScale.domain([0, d3.max(stacked[stacked.length-1], function(d) { return d.y0 + d.y; })]);
var religion = svg.selectAll("g.religion")
.data(stacked);
religion.enter().append("g")
.attr("class", "religion")
.style("fill", function(d, i) { return color(d[0].religion); });
// then data for each, plus mouseovers - a nested selection/enter here
religion.selectAll("rect")
.data(function(d) {
console.log("array for a rectangle", d);
return d; }) // this just gets the array for bar segment.
.enter().append("rect")
.attr("width", xScale.rangeBand())
.on("mouseover", mouseover)
.on("mousemove", mousemove)
.on("mouseout", mouseout);
// the thing that needs to transition is the rectangles themselves, not the g parent.
religion.selectAll("rect")
.transition()
.duration(1000)
.attr("x", function(d) {
return xScale(d.x); })
.attr("y", function(d) {
return yScale(d.y0 + d.y); }) //
.attr("height", function(d) {
return yScale(d.y0) - yScale(d.y0 + d.y); }); // height is base - tallness
religion.exit().remove(); // there's actually nothing removed here - we just transition.
svg.selectAll(".y.axis").transition().duration(1000).call(yAxis);
}
// Building a legend by hand, based on http://bl.ocks.org/mbostock/3886208
function drawLegend() {
// reverse to get the same order as the bar color layers
var religions_reversed = religions.slice().reverse();
var legend = svg.selectAll(".legend")
.data(religions_reversed) // make sure your labels are in the right order -- if not, use .reverse() here.
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
legend.append("rect")
.attr("x", width)
.attr("width", 18)
.attr("height", 18)
.style("fill", function(d) {return color(d)});
legend.append("text")
.attr("x", width + 24)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "start")
.text(function(d, i) { return religions_reversed[i].replace(/_/g, " "); });
}
function mouseover(d) {
// this will highlight both a dot and its line.
var number;
d3.select(this)
.transition()
.style("stroke", "white");
if (currentMode == "bypercent") {
number = d3.format(".1%")(d.y);
} else {
number = d3.format(",")(d.y);
}
tooltip
.style("display", null) // this removes the display none setting from it
.html("<p>Religion: " + d.religion.replace(/_/g, " ") +
"<br>People: " + number +
"<br>Country: " + d.x + " </p>");
}
function mousemove(d) {
tooltip
.style("top", (d3.event.pageY - 10) + "px" )
.style("left", (d3.event.pageX + 10) + "px");
}
function mouseout(d) {
d3.select(this)
.transition()
.style("stroke", "none");
tooltip.style("display", "none"); // this sets it to invisible!
}
});
</script>
Raw
religion.csv
Country Christian Muslim Unaffiliated Hindu Buddhist Folk_Religions Other_Religions Jewish
China 68410000 24690000 700680000 0 244130000 294320000 9080000 0
India 31130000 176190000 870000 973750000 9250000 5840000 27560000 0
USA 243060000 2770000 50980000 1790000 3570000 0 1900000 5690000
Indonesia 23660000 209120000 0 4050000 0 0 0 0
Brazil 173300000 0 15410000 0 0 5540000 0 0
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