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@And-How

And-How/Readme.md

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Last active August 29, 2015 14:14
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Readme.md

This example uses the D3 chord layout function to show the links between different environmental websites.

The chord layout implements the concept of circular visualization introduced in Circos.

Notable features include: responsive image resizing, chord layout rotation, and a generalized chord visualization function with configuration object.

Thanks to Stewart Noyce for the template!

Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<!-- affinity group data, circle rotation, auto-resize svg image, chord function, configuration -->
<title>Open Chord Example</title>
<style>
#visual {
font: 14px sans-serif;
}
.chord path {
fill-opacity: .67;
stroke: #000;
stroke-width: .5px;
}
@media only screen and (min-device-width: 320px) and (max-device-width: 568px) {
#visual {
-webkit-user-select: none;
font-size: 1.2em;
}
}
@media only screen and (min-device-width: 768px) and (max-device-width: 1024px) {
#visual {
-webkit-user-select: none;
}
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var visual = document.getElementById("visual");
// persons moving between Marin, Sonoma, Napa, SF, EB, SV and other regions
var matrix = [
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[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
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];
var array = ["epa.gov","saferoutesinfo.org","pedbikeimages.org","walkbiketoschool.org","fhwa.dot.gov","sacfoodcoop.com","guide.saferoutesinfo.org","hud.gov","pedbikeinfo.org","ucdavis.edu","sacog.org","nhtsa.gov","uptownstudios.net","calendow.org","cityofsacramento.org","lsnc.net","energystar.gov","walkinginfo.org","sacregion511.org","lsnc.info","sierraclub.org","lgc.org","americawalks.org","dot.ca.gov","completestreets.org","saferoutespartnership.org","eeoc.gov","qcode.us","sacbhc.org","smud.org","sacramentoearthday.net","sacregionblueprint.org","walktoschool.org","pge.com","sacbike.org","onefarmatatime.org","ite.org","saferoutesconference.org","peoplepoweredmovement.org","usgbc.org","walksacramento.org","ecosacramento.net","safekids.org","mayisbikemonth.com","policylink.org","nlihc.org","theclimateregistry.org","airquality.org","walklive.org","preventioninstitute.org","northnatomastma.org","seta.net","motherlode.sierraclub.org","ubuntugreen.org","lsncrun.info","sacbreathe.org","ucsusa.org","shra.org","nrdc.org" ,"walkable.org","soilborn.org","swainsonshawk.org","environmentaldefense.org","worldwatch.org","climateregistry.org","sierrahealth.org","sachousingalliance.org","cnps.org","phlpnet.org","vlsp.org","sarariverwatch.org","crla.org","sactree.com","co.yuba.ca.us","cspinet.org","regionalchange.ucdavis.edu","publichealthadvocacy.org","healthedcouncil.org","transportation.org","ediblepedal.com","connectorjpa.net","peoplereachingout.org","newdream.org","my-sisters-house.org","paratransit.org","coveredca.com","pcl.org",
"davisfarmersmarket.org","treelink.org","doe.gov","environmentcalifornia.org","planfolsomblvd.org","about.lsnc.net","calcleanair.org","asianresources.org","agcenter.ucdavis.edu","ghsgeoacademy.com",
"ej.ucdavis.edu","saacenter.org"];
var rotation = -0.7;
var chord_options = {
"gnames": array,
"rotation": rotation,
"colors": ["#034e7b","#feb24c","#b10026","#238443","#fdbb84","#ffffb2","#fed976"]
};
function Chord(container, options, matrix) {
// initialize the chord configuration variables
var config = {
width: 640,
height: 560,
rotation: 0,
textgap: 26,
colors: ["#7fc97f", "#beaed4", "#fdc086", "#ffff99", "#386cb0", "#f0027f", "#bf5b17", "#666666"]
};
// add options to the chord configuration object
if (options) {
extend(config, options);
}
// set chord visualization variables from the configuration object
var offset = Math.PI * config.rotation,
width = config.width,
height = config.height,
textgap = config.textgap
colors = config.colors;
// set viewBox and aspect ratio to enable a resize of the visual dimensions
var viewBoxDimensions = "0 0 " + width + " " + height,
aspect = width / height;
if (config.gnames) {
gnames = config.gnames;
} else {
// make a list of names
gnames = [];
for (var i=97; i<matrix.length; i++) {
gnames.push(String.fromCharCode(i));
}
}
// start the d3 magic
var chord = d3.layout.chord()
.padding(.05)
.sortSubgroups(d3.descending)
.matrix(matrix);
var innerRadius = Math.min(width, height) * .31,
outerRadius = innerRadius * 1.1;
var fill = d3.scale.ordinal()
.domain(d3.range(matrix.length-1))
.range(colors);
var svg = d3.select("body").append("svg")
.attr("id", "visual")
.attr("viewBox", viewBoxDimensions)
.attr("preserveAspectRatio", "xMinYMid") // add viewBox and preserveAspectRatio
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
var g = svg.selectAll("g.group")
.data(chord.groups)
.enter().append("svg:g")
.attr("class", "group");
g.append("svg:path")
.style("fill", function(d) { return fill(d.index); })
.style("stroke", function(d) { return fill(d.index); })
.attr("id", function(d, i) { return "group" + d.index; })
.attr("d", d3.svg.arc().innerRadius(innerRadius).outerRadius(outerRadius).startAngle(startAngle).endAngle(endAngle))
.on("mouseover", fade(.1))
.on("mouseout", fade(1));
g.append("svg:text")
.each(function(d) {d.angle = ((d.startAngle + d.endAngle) / 2) + offset; })
.attr("dy", ".35em")
.attr("text-anchor", function(d) { return d.angle > Math.PI ? "end" : null; })
.attr("transform", function(d) {
return "rotate(" + (d.angle * 180 / Math.PI - 90) + ")"
+ "translate(" + (outerRadius + textgap) + ")"
+ (d.angle > Math.PI ? "rotate(180)" : "");
})
.text(function(d) { return gnames[d.index]; });
svg.append("g")
.attr("class", "chord")
.selectAll("path")
.data(chord.chords)
.enter().append("path")
.attr("d", d3.svg.chord().radius(innerRadius).startAngle(startAngle).endAngle(endAngle))
.style("fill", function(d) { return fill(d.source.index); })
.style("opacity", 1)
.append("svg:title")
.text(function(d) {
return d.source.value + " people from " + gnames[d.source.index] + " commute to " + gnames[d.target.index];
});
// helper functions start here
function startAngle(d) {
return d.startAngle + offset;
}
function endAngle(d) {
return d.endAngle + offset;
}
function extend(a, b) {
for( var i in b ) {
a[ i ] = b[ i ];
}
}
// Returns an event handler for fading a given chord group.
function fade(opacity) {
return function(g, i) {
svg.selectAll(".chord path")
.filter(function(d) { return d.source.index != i && d.target.index != i; })
.transition()
.style("opacity", opacity);
};
}
window.onresize = function() {
var targetWidth = (window.innerWidth < width)? window.innerWidth : width;
var svg = d3.select("#visual")
.attr("width", targetWidth)
.attr("height", targetWidth / aspect);
}
}
window.onload = function() {
Chord(visual, chord_options, matrix);
}
d3.select(self.frameElement).style("height", "600px");
</script>
</body>
</html>
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