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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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body { |
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font: 10px sans-serif; |
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} |
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.axis path, .axis line { |
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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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.dot { |
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stroke: #000; |
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stroke-width: .5px; |
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} |
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.tooltip { |
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position: absolute; |
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width: 200px; |
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height: 28px; |
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pointer-events: none; |
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} |
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.chart { |
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display: inline-block; |
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height: 300px; |
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width: 400px; |
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margin: 30px; |
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} |
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.container { |
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display: grid; |
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grid-column-gap: 0px; |
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grid-template-columns: auto auto auto auto; |
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padding: 10px; |
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} |
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</style> |
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<body> |
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<div align="center"> |
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Scatterplot Matrix using Iris Dataset |
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</div> |
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<div class="container" style="float: left;"></div> |
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<div class="legend" style="float: left;"></div> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script> |
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var margin = {top: 10, right: 10, bottom: 20, left: 20}, |
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width = 400 - margin.left - margin.right, |
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height = 300 - margin.top - margin.bottom; |
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var color = d3.scaleOrdinal(d3.schemeCategory20); |
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var tooltip = d3.select("body").append("div") |
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.attr("class", "tooltip") |
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.style("opacity", 0); |
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function scatterplot(el, data, w, h, var_x, var_y, var_r, var_color) { |
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var x = d3.scaleLinear() |
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.range([0, w]); |
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var y = d3.scaleLinear() |
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.range([h, 0]); |
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var r = d3.scaleSqrt() |
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.range([1,3]); |
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// https://observablehq.com/@d3/axis-ticks |
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var xAxis = d3.axisBottom() |
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.ticks(2) |
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.scale(x); |
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var yAxis = d3.axisLeft() |
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.ticks(5) |
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.scale(y); |
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x.domain(d3.extent(data, function(d){ |
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return d[var_x]; |
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})).nice(); |
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y.domain(d3.extent(data, function(d){ |
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return d[var_y]; |
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})).nice(); |
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r.domain(d3.extent(data, function(d){ |
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return d[var_r]; |
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})).nice(); |
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var svg = el.append("svg") |
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.attr("width", w + margin.left + margin.right) |
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.attr("height", h + margin.bottom + margin.top) |
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.append("g") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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svg.append('g') |
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.attr('transform', 'translate(0,' + h + ')') |
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.attr('class', 'x axis') |
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.call(xAxis); |
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svg.append('g') |
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.attr('transform', 'translate(0,0)') |
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.attr('class', 'y axis') |
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.call(yAxis); |
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svg.selectAll(".dot") |
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.data(data) |
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.enter().append("circle") |
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.attr("class", "dot") |
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.attr("r", function(d) { return r(d[var_r]); }) |
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.attr("cx", function(d) { return x(d[var_x]); }) |
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.attr("cy", function(d) { return y(d[var_y]); }) |
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.style("fill", function(d) { return color(d[var_color]); }) |
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.on("mouseover", function(d){ |
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// highlight on |
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d3.selectAll(".dot").filter(function(e) { |
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return e === d; |
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}) |
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.style("stroke-width", 10) |
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}) |
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.on("mouseout", function(d){ |
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d3.selectAll(".dot").filter(function(e) { |
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return e === d; |
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}) |
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.style("stroke-width", .5) |
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}) |
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.on("click", function(d){ |
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// selection on/off |
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}); |
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} |
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d3.csv('iris.csv', function(error, data){ |
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data.forEach(function(d){ |
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d.sepal_length = +d.sepal_length; |
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d.sepal_width = +d.sepal_width; |
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d.petal_length = +d.petal_length; |
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d.petal_width = +d.petal_width; |
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}); |
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var dims = ["sepal_length", "sepal_width", "petal_width", "petal_length"]; |
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dims.forEach(function(d) { |
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dims.forEach(function(e) { |
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scatterplot(d3.select(".container").append("div"), data, width/dims.length, height/dims.length, d, e, "petal_length", "species") |
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}); |
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}) |
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var clicked = null |
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// color.domain() |
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var legend = d3.select(".legend").append("svg") |
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.attr("width", 200) |
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.attr("height", 400) |
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.selectAll("g") |
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.data(color.domain()) |
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.enter().append("g") |
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.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; }) |
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legend.append("rect") |
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.style("fill", function(d) { return color(d); }) |
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.attr("width", 20) |
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.attr("height", 20) |
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.on("click", function(d) { |
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// Sets the current cateogry opacity |
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d3.selectAll(".symbol").style("opacity", 1) |
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if(clicked !== d) { |
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d3.selectAll(".symbol") |
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.filter(function(e) { |
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return e.species !== d |
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}) |
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.style("opacity", 0.1); |
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// memorize the clicked category |
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clicked = d; |
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} else { |
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// reset |
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clicked = null; |
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} |
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}); |
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legend.append("text") |
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// .attr("x", width - 24) |
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.attr("y", 9) |
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.attr("dx", 20) |
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.attr("dy", ".35em") |
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// .style("text-anchor", "end") |
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.text(function(d) { return d; }); |
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}); |
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</script> |