forked from emeeks's block: Simple Correlation Matrix
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<html lang="en">
<head>
<meta charset="utf-8" />
<title>Correlation Matrix</title>
<style>
.node {
stroke: #fff;
stroke-width: 1.5px;
}
.link {
fill: none;
stroke: #000;
stroke-width: 1.5px;
opacity: 0.4;
marker-end: url(#end-arrow);
}
</style>
</head>
<body>
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8" type="text/javascript"></script>
<script>
//These attributes could be derived from the data
attributes = ["carat","depth","table","price","x","y","z"];
attributeMatrix = [];
attributes.forEach(function (a, x) {
attributes.forEach(function (b, y) {
//create an n-by-n matrix based on pairs of attributes
attributeMatrix.push({a: a, b: b, x: x, y: y})
})
})
colors = d3.scale.ordinal().range(["#827abf", "#f62150", "#6f89b6", "#f5e0b7", "#5b1e37", "#b9e3c5"]);
d3.csv("https://gist.githubusercontent.com/emeeks/6decab485fd2e02c9f1e/raw/9e4d0d1c427d565aa7e3099120f0eca342d035a2/diamonds.csv", small_scatterplots);
d3.select("body").append("svg").attr("height", 1000).attr("width", 1000)
function small_scatterplots(data) {
//d3.csv pulls in data as strings so they need to be formatted as numbers
data.forEach(function (d) {
attributes.forEach(function (att) {
d[att] = parseFloat(d[att])
})
})
//create scales dynamically for each attribute's extent
scale = {};
attributes.forEach(function (att) {
scale[att] = d3.scale.linear();
attExtent = d3.extent(data, function (d) {return d[att]});
scale[att].domain(attExtent).range([5,95]);
})
//bind the matrix array to a grid of g elements
d3.select("svg")
.selectAll("g")
.data(attributeMatrix)
.enter()
.append("g")
.attr("transform", function (d) {return "translate(" + (d.x * 100) + "," + (d.y * 100) + ")" });
d3.selectAll("g")
.each(function (matrix, i) {
//index i is only used for coloring
//background/border
d3.select(this).append("rect").style("fill", "white").style("stroke", "black").style("stroke-width", 1)
.attr("height", 100)
.attr("width", 100);
//label
d3.select(this).append("text")
.attr("x", 50)
.style("text-anchor", "middle")
.attr("y", 15)
.text(matrix.a + " - " + matrix.b);
//scatterplot points
d3.select(this).selectAll("circle")
.data(data)
.enter()
.append("circle")
.attr("r", 2)
.style("fill", colors(i))
.attr("cx", function (d) {return scale[matrix.a](d[matrix.a])})
.attr("cy", function (d) {return 95 - scale[matrix.b](d[matrix.b])})
})
}
</script>
</body>
</html>
Modified http://d3js.org/d3.v3.min.js to a secure url
https://d3js.org/d3.v3.min.js