Created
November 16, 2012 00:16
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Demonstration of red/blue interpolation options
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<!DOCTYPE html> | |
<html> <head> | |
<script src="http://d3js.org/d3.v2.js"></script> | |
<style type="text/css"> | |
svg text { font: 12px sans-serif; fill: white; text-anchor: middle; opacity: 0.7;} | |
h2 { font-family: Helvetica; font-size: 16px; padding: 8px 0px 3px 0px; margin: 0 0 0 0; } | |
</style> | |
</head> | |
<body> | |
<script> | |
// Code originally derived from http://enjalot.com/tributary/3650755/ | |
var w = 390; | |
// Colors from http://elections.nytimes.com/2012/results/president | |
var nytimes = ["#b43030", "#405695" ]; | |
var ugly = ["#ff0000", "#0000ff" ]; | |
var data1 = d3.range(w/2); | |
function addBars(interpolator, label, colors) { | |
var svg = d3.select("body") | |
.append("div") | |
.append("svg:svg") | |
.attr("width", w).attr("height", 40); | |
var rects = svg.append("svg:g") | |
.selectAll("rect") | |
.data(data1); | |
svg.append("text") | |
.text(label) | |
.attr("transform", "translate(" + w/2 + ",36)"); | |
var colorScale = d3.scale.linear() | |
.domain([d3.min(data1), d3.max(data1)]) | |
//.interpolate(d3.interpolateHsl) | |
//.interpolate(d3.interpolateLab) | |
.interpolate(interpolator) | |
.range(colors); | |
rects.enter() | |
.append("rect") | |
.attr({ | |
width: 2, | |
height: 40, | |
y: 0, | |
x: function(d,i) { | |
return i * 2; | |
}, | |
fill: function(d,i) { | |
return colorScale(d); | |
} | |
}) | |
}; | |
d3.select("body").append("h2").text("Party logo colors"); | |
addBars(d3.interpolateRgb, "RGB", nytimes); | |
addBars(d3.interpolateHsl, "HSL", nytimes); | |
addBars(d3.interpolateLab, "LAB", nytimes); | |
addBars(d3.interpolateHcl, "HCL", nytimes); | |
d3.select("body").append("h2").text("#ff0000 to #0000ff"); | |
addBars(d3.interpolateRgb, "RGB", ugly); | |
addBars(d3.interpolateHsl, "HSL", ugly); | |
addBars(d3.interpolateLab, "LAB", ugly); | |
addBars(d3.interpolateHcl, "HCL", ugly); | |
</script> | |
</body> </html> |
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