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<!DOCTYPE html> |
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<html> |
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<head> |
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<style> |
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body { |
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margin: 0 auto; |
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display: table; |
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font-family: "Helvetica Neue", sans-serif; |
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} |
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rect.selected { |
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stroke: #000; |
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stroke-width: 2px; |
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} |
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.axis .domain { |
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display: none; |
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} |
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.axis .tick text.selected { |
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font-weight: bold; |
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font-size: 1.2em; |
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fill: #47ff63; |
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} |
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.axis .tick line.selected { |
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stroke: #47ff63; |
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} |
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.tip { |
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position: absolute; |
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font-size: .8em; |
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text-align: center; |
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text-shadow: -1px -1px 1px #ffffff, -1px 0px 1px #ffffff, -1px 1px 1px #ffffff, 0px -1px 1px #ffffff, 0px 1px 1px #ffffff, 1px -1px 1px #ffffff, 1px 0px 1px #ffffff, 1px 1px 1px #ffffff; |
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} |
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#legend { |
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margin-bottom: 10px; |
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} |
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#legend text { |
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font-size: .8em; |
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} |
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</style> |
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</head> |
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<body> |
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<div id="legend"></div> |
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<div id="grid"></div> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script src="https://unpkg.com/[email protected]/lib/jeezy.min.js"></script> |
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<script src="https://unpkg.com/[email protected]/build/data2grid.min.js"></script> |
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<script src="https://cdnjs.cloudflare.com/ajax/libs/chroma-js/1.3.5/chroma.min.js"></script> |
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<script> |
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d3.select("body").append("div").attr("class", "tip").style("display", "none"); |
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var data = []; |
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var cols = "abcdefghijklmnopqrstuvwxyz".split(""); |
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for (var i = 0; i <= 30; i++){ |
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var obj = {index: i}; |
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cols.forEach(col => { |
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obj[col] = jz.num.randBetween(1, 100); |
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}); |
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data.push(obj); |
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} |
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var corr = jz.arr.correlationMatrix(data, cols); |
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var extent = d3.extent(corr.map(function(d){ return d.correlation; }).filter(function(d){ return d !== 1; })); |
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var grid = data2grid.grid(corr); |
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var rows = d3.max(grid, function(d){ return d.row; }); |
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var margin = {top: 20, bottom: 1, left: 20, right: 1}; |
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var dim = d3.min([window.innerWidth * .9, window.innerHeight * .9]); |
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var width = dim - margin.left - margin.right, height = dim - margin.top - margin.bottom; |
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var svg = d3.select("#grid").append("svg") |
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.attr("width", width + margin.left + margin.right) |
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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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var padding = .1; |
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var x = d3.scaleBand() |
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.range([0, width]) |
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.paddingInner(padding) |
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.domain(d3.range(1, rows + 1)); |
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var y = d3.scaleBand() |
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.range([0, height]) |
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.paddingInner(padding) |
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.domain(d3.range(1, rows + 1)); |
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var c = chroma.scale(["tomato", "white", "steelblue"]) |
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.domain([extent[0], 0, extent[1]]); |
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var x_axis = d3.axisTop(y).tickFormat(function(d, i){ return cols[i]; }); |
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var y_axis = d3.axisLeft(x).tickFormat(function(d, i){ return cols[i]; }); |
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svg.append("g") |
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.attr("class", "x axis") |
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.call(x_axis); |
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svg.append("g") |
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.attr("class", "y axis") |
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.call(y_axis); |
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svg.selectAll("rect") |
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.data(grid, function(d){ return d.column_a + d.column_b; }) |
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.enter().append("rect") |
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.attr("x", function(d){ return x(d.column); }) |
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.attr("y", function(d){ return y(d.row); }) |
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.attr("width", x.bandwidth()) |
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.attr("height", y.bandwidth()) |
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.style("fill", function(d){ return c(d.correlation); }) |
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.style("opacity", 1e-6) |
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.transition() |
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.style("opacity", 1); |
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svg.selectAll("rect") |
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d3.selectAll("rect") |
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.on("mouseover", function(d){ |
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d3.select(this).classed("selected", true); |
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d3.select(".tip") |
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.style("display", "block") |
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.html(d.column_x + ", " + d.column_y + ": " + d.correlation.toFixed(2)); |
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var row_pos = y(d.row); |
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var col_pos = x(d.column); |
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var tip_pos = d3.select(".tip").node().getBoundingClientRect(); |
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var tip_width = tip_pos.width; |
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var tip_height = tip_pos.height; |
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var grid_pos = d3.select("#grid").node().getBoundingClientRect(); |
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var grid_left = grid_pos.left; |
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var grid_top = grid_pos.top; |
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var left = grid_left + col_pos + margin.left + (x.bandwidth() / 2) - (tip_width / 2); |
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var top = grid_top + row_pos + margin.top - tip_height - 5; |
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d3.select(".tip") |
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.style("left", left + "px") |
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.style("top", top + "px"); |
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d3.select(".x.axis .tick:nth-of-type(" + d.column + ") text").classed("selected", true); |
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d3.select(".y.axis .tick:nth-of-type(" + d.row + ") text").classed("selected", true); |
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d3.select(".x.axis .tick:nth-of-type(" + d.column + ") line").classed("selected", true); |
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d3.select(".y.axis .tick:nth-of-type(" + d.row + ") line").classed("selected", true); |
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}) |
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.on("mouseout", function(){ |
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d3.selectAll("rect").classed("selected", false); |
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d3.select(".tip").style("display", "none"); |
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d3.selectAll(".axis .tick text").classed("selected", false); |
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d3.selectAll(".axis .tick line").classed("selected", false); |
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}); |
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// legend scale |
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var legend_top = 15; |
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var legend_height = 15; |
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var legend_svg = d3.select("#legend").append("svg") |
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.attr("width", width + margin.left + margin.right) |
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.attr("height", legend_height + legend_top) |
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.append("g") |
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.attr("transform", "translate(" + margin.left + ", " + legend_top + ")"); |
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var defs = legend_svg.append("defs"); |
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var gradient = defs.append("linearGradient") |
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.attr("id", "linear-gradient"); |
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var stops = [{offset: 0, color: "tomato", value: extent[0]}, {offset: .5, color: "white", value: 0}, {offset: 1, color: "steelblue", value: extent[1]}]; |
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gradient.selectAll("stop") |
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.data(stops) |
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.enter().append("stop") |
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.attr("offset", function(d){ return (100 * d.offset) + "%"; }) |
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.attr("stop-color", function(d){ return d.color; }); |
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legend_svg.append("rect") |
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.attr("width", width) |
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.attr("height", legend_height) |
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.style("fill", "url(#linear-gradient)"); |
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legend_svg.selectAll("text") |
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.data(stops) |
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.enter().append("text") |
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.attr("x", function(d){ return width * d.offset; }) |
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.attr("dy", -3) |
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.style("text-anchor", function(d, i){ return i == 0 ? "start" : i == 1 ? "middle" : "end"; }) |
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.text(function(d, i){ return d.value.toFixed(2) + (i == 2 ? ">" : ""); }) |
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</script> |
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</body> |
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</html> |