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131 lines
3.1 KiB
HTML
131 lines
3.1 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>Parallel Coordinates</title>
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<style>
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svg {
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font: 10px sans-serif;
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}
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.background path {
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fill: none;
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stroke: #ccc;
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stroke-opacity: .4;
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shape-rendering: crispEdges;
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}
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.foreground path {
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fill: none;
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stroke: steelblue;
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stroke-opacity: .7;
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}
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.brush .extent {
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fill-opacity: .3;
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stroke: #fff;
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shape-rendering: crispEdges;
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}
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.axis line, .axis path {
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fill: none;
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stroke: #000;
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shape-rendering: crispEdges;
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}
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.axis text {
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text-shadow: 0 1px 0 #fff;
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}
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</style>
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<body>
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<script src="../../d3.js"></script>
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<script>
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var margin = {top: 30, right: 10, bottom: 10, left: 10},
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width = 960 - margin.right - margin.left,
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height = 500 - margin.top - margin.bottom;
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var x = d3.scale.ordinal()
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.rangePoints([0, width], 1);
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var y = {};
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var line = d3.svg.line(),
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axis = d3.svg.axis().orient("left"),
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background,
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foreground;
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var svg = d3.select("body").append("svg")
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.attr("width", width + margin.right + margin.left)
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.attr("height", height + margin.top + margin.bottom)
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.append("g")
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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d3.csv("cars.csv", function(error, cars) {
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// Extract the list of dimensions and create a scale for each.
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x.domain(dimensions = d3.keys(cars[0]).filter(function(d) {
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return d != "name" && (y[d] = d3.scale.linear()
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.domain(d3.extent(cars, function(p) { return +p[d]; }))
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.range([height, 0]));
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}));
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// Add grey background lines for context.
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background = svg.append("g")
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.attr("class", "background")
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.selectAll("path")
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.data(cars)
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.enter().append("path")
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.attr("d", path);
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// Add blue foreground lines for focus.
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foreground = svg.append("g")
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.attr("class", "foreground")
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.selectAll("path")
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.data(cars)
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.enter().append("path")
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.attr("d", path);
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// Add a group element for each dimension.
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var g = svg.selectAll(".dimension")
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.data(dimensions)
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.enter().append("g")
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.attr("class", "dimension")
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.attr("transform", function(d) { return "translate(" + x(d) + ")"; });
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// Add an axis and title.
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g.append("g")
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.attr("class", "axis")
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.each(function(d) { d3.select(this).call(axis.scale(y[d])); })
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.append("text")
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.attr("text-anchor", "middle")
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.attr("y", -9)
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.text(String);
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// Add and store a brush for each axis.
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g.append("g")
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.attr("class", "brush")
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.each(function(d) { d3.select(this).call(y[d].brush = d3.svg.brush().y(y[d]).on("brush", brush)); })
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.selectAll("rect")
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.attr("x", -8)
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.attr("width", 16);
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});
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// Returns the path for a given data point.
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function path(d) {
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return line(dimensions.map(function(p) { return [x(p), y[p](d[p])]; }));
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}
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// Handles a brush event, toggling the display of foreground lines.
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function brush() {
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var actives = dimensions.filter(function(p) { return !y[p].brush.empty(); }),
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extents = actives.map(function(p) { return y[p].brush.extent(); });
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foreground.style("display", function(d) {
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return actives.every(function(p, i) {
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return extents[i][0] <= d[p] && d[p] <= extents[i][1];
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}) ? null : "none";
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});
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}
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</script>
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