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ch7-6.html
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ch7-6.html
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<html>
<head>
<title>Weekly site visits by Country</title>
<meta name="description" content="Practical D3">
<meta name="author" content="Tarek Amr, @gr33ndata">
</head>
<body>
</body>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script type="text/javascript">
var weekly_visits = [
{
"name": "Japan",
"values": [
{ "x": 0, "y": 12},
{ "x": 1, "y": 11},
{ "x": 2, "y": 15},
{ "x": 3, "y": 21},
{ "x": 4, "y": 23},
{ "x": 5, "y": 13},
{ "x": 6, "y": 12}
],
"colour": "#FF0000"
},
{
"name": "Italy",
"values": [
{ "x": 0, "y": 12},
{ "x": 1, "y": 19},
{ "x": 2, "y": 16},
{ "x": 3, "y": 32},
{ "x": 4, "y": 41},
{ "x": 5, "y": 18},
{ "x": 6, "y": 12},
],
"colour": "#00FF00"
},
{
"name": "France",
"values": [
{ "x": 0, "y": 32},
{ "x": 1, "y": 22},
{ "x": 2, "y": 33},
{ "x": 3, "y": 33},
{ "x": 4, "y": 11},
{ "x": 5, "y": 10},
{ "x": 6, "y": 32},
],
"colour": "#0000FF"
},
{
"name": "Spain",
"values": [
{ "x": 0, "y": 12},
{ "x": 1, "y": 19},
{ "x": 2, "y": 16},
{ "x": 3, "y": 32},
{ "x": 4, "y": 41},
{ "x": 5, "y": 18},
{ "x": 6, "y": 12},
],
"colour": "#FF0000"
},
{
"name": "Greece",
"values": [
{ "x": 0, "y": 12},
{ "x": 1, "y": 11},
{ "x": 2, "y": 15},
{ "x": 3, "y": 37},
{ "x": 4, "y": 43},
{ "x": 5, "y": 13},
{ "x": 6, "y": 12}
],
"colour": "#FF0000"
},
{
"name": "China",
"values": [
{ "x": 0, "y": 32},
{ "x": 1, "y": 22},
{ "x": 2, "y": 33},
{ "x": 3, "y": 33},
{ "x": 4, "y": 11},
{ "x": 5, "y": 10},
{ "x": 6, "y": 32},
],
"colour": "#0000FF"
},
];
var w= 690, h = 380;
var h_margin = 20, v_margin = 55;
var svg = d3.select('body').append('svg')
.style("background", "#FFF")
.attr('width', w+2*h_margin)
.attr('height', h+2*v_margin);
var colours = d3.scale.category20c();
var stack = d3.layout.stack()
.offset('silhouette')
.values(function(d){
return d.values;
});
weekly_visits_stack = stack(weekly_visits);
console.log(weekly_visits_stack);
max_y = d3.max(
weekly_visits_stack[weekly_visits_stack.length - 1]["values"],
function(d){ return d.y0 + d.y; }
)
x_range = weekly_visits_stack[0]["values"].filter(function(e,i,a){
return (i == 0 || i == (a.length - 1)) ? true : false ;
}).map(function(d){
return d["x"]
});
var a = d3.scale.linear()
.domain(x_range)
.range([-0.80*Math.PI, 0.80*Math.PI]);
var r = d3.scale.linear()
.domain([0, max_y])
.range([0, 0.7*h]);
var area = d3.svg.area.radial()
.interpolate('cardinal')
.angle(function(d, i) { return a(d.x); })
.innerRadius(function(d) { return r(d.y0); })
.outerRadius(function(d) { return r(d.y0 + d.y); });
svg.selectAll("path")
.data(weekly_visits_stack)
.enter()
.append("path")
.attr("d", function(d){
return area(d["values"]);
})
.style("fill", function(d, i){
return colours(i);
})
.attr("stroke", "#FFF")
.attr("stroke-width", 0)
.style("opacity", 0.70)
.on("mouseover", function(d) {
d3.select(this).style("opacity", 0.95);
})
.on("mouseout", function(d) {
d3.select(this).style("opacity", 0.70);
})
.attr("transform", "translate("+(0.5*w)+","+(0.8*h)+")");;
var textScale = d3.scale.ordinal().domain(weekly_visits_stack.map(function(d,i){ return i; })).rangePoints([0.20*r(max_y), 0.60*r(max_y)]);
svg.selectAll("text")
.data(weekly_visits_stack)
.enter()
.append("text")
.attr("x", function(d, i){
return w/2;
})
.attr("y", function(d, i){
console.log(d.values);
return 0.83*h + textScale(i);
})
.text(function(d){
return d["name"];
})
.style("text-anchor", "middle")
.attr("font-size", function(d,i){
return 22;
})
.style("fill", function(d,i){
return colours(i);
});
</script>
<html>