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Parallel Coordinates
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<!DOCTYPE html> <meta charset="utf-8"> <style> svg { font: 10px sans-serif; } .background path { fill: none; stroke: #ccc; stroke-opacity: .4; shape-rendering: crispEdges; } .foreground path { fill: none; stroke: steelblue; stroke-opacity: .7; } .brush .extent { fill-opacity: .3; stroke: #fff; shape-rendering: crispEdges; } .axis line, .axis path { fill: none; stroke: #000; shape-rendering: crispEdges; } .axis text { text-shadow: 0 1px 0 #fff; cursor: move; } </style> <body> <script src="//d3js.org/d3.v3.min.js"></script> <script> var m = [30, 10, 10, 10], w = 960 - m[1] - m[3], h = 500 - m[0] - m[2]; var x = d3.scale.ordinal().rangePoints([0, w], 1), y = {}, dragging = {}; var line = d3.svg.line(), axis = d3.svg.axis().orient("left"), background, foreground; var svg = d3.select("body").append("svg") .attr("width", w + m[1] + m[3]) .attr("height", h + m[0] + m[2]) .append("g") .attr("transform", "translate(" + m[3] + "," + m[0] + ")"); d3.csv("cars.csv", function(error, cars) { // Extract the list of dimensions and create a scale for each. x.domain(dimensions = d3.keys(cars[0]).filter(function(d) { return d != "name" && (y[d] = d3.scale.linear() .domain(d3.extent(cars, function(p) { return +p[d]; })) .range([h, 0])); })); // Add grey background lines for context. background = svg.append("g") .attr("class", "background") .selectAll("path") .data(cars) .enter().append("path") .attr("d", path); // Add blue foreground lines for focus. foreground = svg.append("g") .attr("class", "foreground") .selectAll("path") .data(cars) .enter().append("path") .attr("d", path); // Add a group element for each dimension. var g = svg.selectAll(".dimension") .data(dimensions) .enter().append("g") .attr("class", "dimension") .attr("transform", function(d) { return "translate(" + x(d) + ")"; }) .call(d3.behavior.drag() .on("dragstart", function(d) { dragging[d] = this.__origin__ = x(d); background.attr("visibility", "hidden"); }) .on("drag", function(d) { dragging[d] = Math.min(w, Math.max(0, this.__origin__ += d3.event.dx)); foreground.attr("d", path); dimensions.sort(function(a, b) { return position(a) - position(b); }); x.domain(dimensions); g.attr("transform", function(d) { return "translate(" + position(d) + ")"; }) }) .on("dragend", function(d) { delete this.__origin__; delete dragging[d]; transition(d3.select(this)).attr("transform", "translate(" + x(d) + ")"); transition(foreground) .attr("d", path); background .attr("d", path) .transition() .delay(500) .duration(0) .attr("visibility", null); })); // Add an axis and title. g.append("g") .attr("class", "axis") .each(function(d) { d3.select(this).call(axis.scale(y[d])); }) .append("text") .attr("text-anchor", "middle") .attr("y", -9) .text(String); // Add and store a brush for each axis. g.append("g") .attr("class", "brush") .each(function(d) { d3.select(this).call(y[d].brush = d3.svg.brush().y(y[d]).on("brushstart", brushstart).on("brush", brush)); }) .selectAll("rect") .attr("x", -8) .attr("width", 16); }); function position(d) { var v = dragging[d]; return v == null ? x(d) : v; } function transition(g) { return g.transition().duration(500); } // Returns the path for a given data point. function path(d) { return line(dimensions.map(function(p) { return [position(p), y[p](d[p])]; })); } // When brushing, don’t trigger axis dragging. function brushstart() { d3.event.sourceEvent.stopPropagation(); } // Handles a brush event, toggling the display of foreground lines. function brush() { var actives = dimensions.filter(function(p) { return !y[p].brush.empty(); }), extents = actives.map(function(p) { return y[p].brush.extent(); }); foreground.style("display", function(d) { return actives.every(function(p, i) { return extents[i][0] <= d[p] && d[p] <= extents[i][1]; }) ? null : "none"; }); } </script>
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cars.csv
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