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tomgp/d3-iconarray.js

Last active March 2, 2016 16:34
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Outcomes associated with group B strep (GBS) among pregnant women
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readme.md

Icon array example

A recreation of an illustration from this Scientific American article on icon arrays. using the layout function of my d3 icon array plugin

Raw
d3-iconarray.js
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-scale')) :
typeof define === 'function' && define.amd ? define(['exports', 'd3-scale'], factory) :
(factory((global.d3_iconarray = global.d3_iconarray || {}),global.d3));
}(this, function (exports,d3) { 'use strict';
function iconArrayLayout() {
var width = undefined;
var height = undefined;
var widthFirst = true;
var maxDimension = undefined;
function layout(data){
//work our missing height, width stuff
setDimensions(data.length);
return data.map(function(d,i){
return {
data:d,
position:position(i)
};
});
}
function position(i){
if(isNaN(width) || isNaN(height)){
console.log('Warning: width/height undefined')
return 0;
}
if(widthFirst){
return {
x: i % width,
y: Math.floor( i/width )
};
}else{
return {
x: Math.floor( i/height ),
y: i % height
};
}
}
function setDimensions(l){
//neither width or height is defined
if(isNaN(width) && isNaN(height)){
console.log('no width or height');
if(widthFirst){
width = Math.ceil( Math.sqrt(l) );
height = Math.ceil( l / width );
}else{
height = Math.ceil( Math.sqrt(l) );
width = Math.ceil( l / height );
}
}else if(isNaN(width)){ //width undefined
width = Math.ceil( l / height );
}else if(isNaN(height)){ //height undefined
height = Math.ceil( l / width );
}
}
layout.maxDimension = function(x){
var itemPosition = position(x);
if(widthFirst){
var x = Math.max(itemPosition.x, width);
return Math.max(x, itemPosition.y);
}
var y = Math.max(itemPosition.y, height);
return Math.max(y, itemPosition.x);
}
layout.position = function(x){
return position(x);
}
layout.width = function(x){
if(x === undefined) return width;
width = x;
return layout;
};
layout.height = function(x){
if(x === undefined) return height;
height = x;
return layout;
};
layout.widthFirst = function(b){
if(b === undefined) return widthFirst;
widthFirst = b;
return layout;
};
return layout;
};
function iconArrayScale(){
var domain = [0,100];
var range = [0,100];
var gapInterval = 10;
var gapSize = 0; //default no change
var notionalScale = d3.scaleLinear()
.domain(domain)
.range(range);
function scale(domainValue){
var rangeValue = 20;
var adjustedDomainValue = domainValue + Math.floor(domainValue/gapInterval)*gapSize;
//console.log(notionalScale.domain());
return rangeValue = notionalScale(adjustedDomainValue);
}
function rescale(){
//calculate an adjusted domain
var domainLength = (domain[1] - domain[0]) * gapSize;
var gaps = Math.ceil( domainLength/ gapInterval );
var adjustedDomain = [ domain[0], domain[1] + gaps ];
//calculate an adjusted range
notionalScale.domain(adjustedDomain)
.range(range);
}
scale.gapInterval = function(x){
if(!x) return gapInterval;
gapInterval = x;
rescale();
return scale;
};
scale.gapSize = function(x){
if(isNaN(x)) return gapSize;
gapSize = x;
rescale();
return scale;
}
scale.domain = function(array){
if(!array) return domain;
domain = array;
rescale();
return scale;
};
scale.range = function(array){
if(!array) return range;
range = array;
rescale();
return scale;
};
rescale();
return scale;
}
var version = "0.0.1";
exports.version = version;
exports.layout = iconArrayLayout;
exports.scale = iconArrayScale;
}));
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<title>VARIOUS OUTCOMES ASSOCIATED WITH GROUP B STREP (GBS) AMONG PREGNANT WOMEN</title>
<script src="//d3js.org/d3.v4.0.0-alpha.18.min.js" charset="utf-8"></script>
<script type="text/javascript" src="d3-iconarray.js"></script>
<style type="text/css">
*{
font-family: sans-serif;
color: #333;
}
</style>
</head>
<body>
<h1>Outcomes associated with group B strep (GBS) among pregnant women</h1>
<p>after <a href="http://blogs.scientificamerican.com/sa-visual/inadequate-data-visualization-leaves-patients-undereducated/">Amanda Montañez</a></p>
<div id="gbs-example">
</div>
</body>
<script type="text/javascript">
var data = [
{
label:'Women who test negative for GBS',
count:402,
colour:'#6bbde9'
},
{
label:'Women who test positive but do not pass the bacteria to their babies',
count:49,
colour:'#0b95a3'
},
{
label:'Women who pass the bacteria to their babies without resulting illness',
count:48,
colour:'#ed7fa0'
},
{
label:'Women whose babies contract early onset GBS disease',
count:1,
colour:'#815a82'
}
];
var layout = d3_iconarray.layout()
.width(25);
//expand the data to an array
var dataArray = data.reduce(function(value, d){
for(var i=0;i<d.count ;i++){
value.push(d.colour);
}
return value;
}, []);
var grid = layout(dataArray);
var dotRadius = 7;
var width = 800,
height = 600,
margin = {top:20, bottom:20, left:20, right:300 };
var arrayScale = d3.scaleLinear()
.domain([ 0, 25 ])
.range([0, width-(margin.left+margin.right)]);
var svg = d3.select('#gbs-example')
.append('svg')
.attr('width',width)
.attr('height',height)
.append('g')
.attr('transform','translate('+margin.left+','+margin.top+')');
svg.selectAll('circle')
.data(grid)
.enter()
.append('circle')
.attr('cx', function(d){
return arrayScale(d.position.x);
})
.attr('cy', function(d){
return arrayScale(d.position.y);
})
.attr('r',dotRadius)
.attr('fill',function(d){ return d.data; })
d3.select('#gbs-example svg')
.append('g').attr('transform','translate('+ (width-margin.right + 30)+',' + (margin.top + dotRadius) + ')')
.selectAll('g.key-element')
.data(data)
.enter()
.append('g')
.attr('transform',function(d,i){ return 'translate(0,'+(i*60)+')'; })
.attr('class','key-element')
.call(function(parent){
parent.append('circle')
.attr('r', dotRadius)
.attr('cx', -dotRadius*2)
.attr('cy', -dotRadius)
.attr('fill', function(d){ return d.colour; })
parent.append('text')
.attr('dx', 0)
.attr('dy',0 )
.text(function(d){
return d.label;
})
.call(wrap, margin.right-20);
})
//wrapping long labels https://bl.ocks.org/mbostock/7555321
function wrap(text, width) {
text.each(function() {
var text = d3.select(this),
words = text.text().split(/\s+/).reverse(),
word,
line = [],
lineNumber = 0,
lineHeight = 1.1, // ems
y = text.attr("y"),
dy = parseFloat(text.attr("dy")),
tspan = text.text(null).append("tspan").attr("x", 0).attr("y", y).attr("dy", dy + "em");
while (word = words.pop()) {
line.push(word);
tspan.text(line.join(" "));
if (tspan.node().getComputedTextLength() > width) {
line.pop();
tspan.text(line.join(" "));
line = [word];
tspan = text.append("tspan").attr("x", 0).attr("y", y).attr("dy", ++lineNumber * lineHeight + dy + "em").text(word);
}
}
});
}
d3.select(self.frameElement).style("height", (height + 200)+"px");
</script>
</html>
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