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Scatter Plot
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style type="text/css"> | |
.axis path, | |
.axis line { | |
fill: none; | |
stroke: black; | |
shape-rendering: crispEdges; | |
} | |
.axis text { | |
font-family: sans-serif; | |
font-size: 11px; | |
} | |
</style> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<body> | |
<script type="text/javascript"> | |
var dataset = []; | |
var numDataPoints = 3000; | |
var xRange = Math.random() * 1000; | |
var yRange = Math.random() * 1000; | |
for(var i = 0; i < numDataPoints; i++) { | |
var t = Math.random()*Math.PI; | |
var x = Math.random() * xRange; | |
var y = Math.sqrt(x)*(0.5*(1+Math.cos(t))); | |
dataset.push([Math.floor(x), Math.floor(y), t]); | |
} | |
var w = 960; | |
var h = 500; | |
var padding = 50; | |
var xScale = d3.scale.linear() | |
.domain([0, d3.max(dataset, function(d) { | |
return d[0]; | |
})]) | |
.range([padding, w-60]); | |
var yScale = d3.scale.linear() | |
.domain([0, d3.max(dataset, function(d) { | |
return d[1]; | |
})]) | |
.range([h - padding, padding]); | |
var rScale = d3.scale.linear() | |
.domain([0, d3.max(dataset, function(d) { return d[1] })]) | |
.range([6, 1]); | |
var alphaScale = d3.scale.linear() | |
.domain([0, d3.max(dataset, function(d) { return d[1] })]) | |
.range([0, 0.5]); | |
var svg = d3.select("body").append("svg") | |
.attr({ | |
width: w, | |
height: h | |
}); | |
svg.selectAll("circle") | |
.data(dataset) | |
.enter() | |
.append("circle") | |
.attr("cx", function(d, i) { | |
return xScale(d[0]); | |
}) | |
.attr("cy", function(d, i) { | |
return yScale(d[1]); | |
}) | |
.attr("r", function(d, i) { | |
return rScale(d[1]); | |
}) | |
.attr("fill", function(d) { | |
return "rgb(" + Math.floor(255-255*d[2]/Math.PI) + ", 0, " + Math.floor(255*d[2]/Math.PI) + ")"; | |
}) | |
.attr("opacity", function(d, i) { return alphaScale(d[1]); }); | |
svg.selectAll("text") | |
.data(dataset) | |
.enter() | |
.append("text") | |
.attr({ | |
"font-family": "sans-serif", | |
"font-size": "10px", | |
"fill": "red", | |
"text-anchor": "right", | |
"opacity": "0" | |
}) | |
.attr("x", function(d, i) { return xScale(d[0]); }) | |
.attr("y", function(d, i) { return yScale(d[1]); }) | |
.text(function(d, i) { | |
return d[0] + "," + d[1]; | |
}); | |
var xAxis = d3.svg.axis() | |
.scale(xScale) | |
.orient("bottom") | |
.ticks(5); | |
svg.append("g") | |
.attr({ | |
"class": "axis", | |
"transform": "translate(0, " + (h - padding) + ")" | |
}) | |
.call(xAxis); | |
var yAxis = d3.svg.axis() | |
.scale(yScale) | |
.orient("left") | |
.ticks(5); | |
svg.append("g") | |
.attr({ | |
"class": "axis", | |
"transform": "translate(" + padding + ", 0)" | |
}) | |
.call(yAxis); | |
</script> | |
</body> |
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