| license: gpl-3.0 | |
| border: no | |
| height: 960 | |
| redirect: https://observablehq.com/@d3/brushable-scatterplot-matrix |
The scatterplot matrix visualizations pairwise correlations for multi-dimensional data; each cell in the matrix is a scatterplot. This example uses Anderson's data of iris flowers on the Gaspé Peninsula. Scatterplot matrix design invented by J. A. Hartigan; see also R and GGobi. Data on Iris flowers collected by Edgar Anderson and published by Ronald Fisher.
See also this simpler static version without brushing.
| sepal length | sepal width | petal length | petal width | species | |
|---|---|---|---|---|---|
| 5.1 | 3.5 | 1.4 | 0.2 | setosa | |
| 4.9 | 3.0 | 1.4 | 0.2 | setosa | |
| 4.7 | 3.2 | 1.3 | 0.2 | setosa | |
| 4.6 | 3.1 | 1.5 | 0.2 | setosa | |
| 5.0 | 3.6 | 1.4 | 0.2 | setosa | |
| 5.4 | 3.9 | 1.7 | 0.4 | setosa | |
| 4.6 | 3.4 | 1.4 | 0.3 | setosa | |
| 5.0 | 3.4 | 1.5 | 0.2 | setosa | |
| 4.4 | 2.9 | 1.4 | 0.2 | setosa | |
| 4.9 | 3.1 | 1.5 | 0.1 | setosa | |
| 5.4 | 3.7 | 1.5 | 0.2 | setosa | |
| 4.8 | 3.4 | 1.6 | 0.2 | setosa | |
| 4.8 | 3.0 | 1.4 | 0.1 | setosa | |
| 4.3 | 3.0 | 1.1 | 0.1 | setosa | |
| 5.8 | 4.0 | 1.2 | 0.2 | setosa | |
| 5.7 | 4.4 | 1.5 | 0.4 | setosa | |
| 5.4 | 3.9 | 1.3 | 0.4 | setosa | |
| 5.1 | 3.5 | 1.4 | 0.3 | setosa | |
| 5.7 | 3.8 | 1.7 | 0.3 | setosa | |
| 5.1 | 3.8 | 1.5 | 0.3 | setosa | |
| 5.4 | 3.4 | 1.7 | 0.2 | setosa | |
| 5.1 | 3.7 | 1.5 | 0.4 | setosa | |
| 4.6 | 3.6 | 1.0 | 0.2 | setosa | |
| 5.1 | 3.3 | 1.7 | 0.5 | setosa | |
| 4.8 | 3.4 | 1.9 | 0.2 | setosa | |
| 5.0 | 3.0 | 1.6 | 0.2 | setosa | |
| 5.0 | 3.4 | 1.6 | 0.4 | setosa | |
| 5.2 | 3.5 | 1.5 | 0.2 | setosa | |
| 5.2 | 3.4 | 1.4 | 0.2 | setosa | |
| 4.7 | 3.2 | 1.6 | 0.2 | setosa | |
| 4.8 | 3.1 | 1.6 | 0.2 | setosa | |
| 5.4 | 3.4 | 1.5 | 0.4 | setosa | |
| 5.2 | 4.1 | 1.5 | 0.1 | setosa | |
| 5.5 | 4.2 | 1.4 | 0.2 | setosa | |
| 4.9 | 3.1 | 1.5 | 0.2 | setosa | |
| 5.0 | 3.2 | 1.2 | 0.2 | setosa | |
| 5.5 | 3.5 | 1.3 | 0.2 | setosa | |
| 4.9 | 3.6 | 1.4 | 0.1 | setosa | |
| 4.4 | 3.0 | 1.3 | 0.2 | setosa | |
| 5.1 | 3.4 | 1.5 | 0.2 | setosa | |
| 5.0 | 3.5 | 1.3 | 0.3 | setosa | |
| 4.5 | 2.3 | 1.3 | 0.3 | setosa | |
| 4.4 | 3.2 | 1.3 | 0.2 | setosa | |
| 5.0 | 3.5 | 1.6 | 0.6 | setosa | |
| 5.1 | 3.8 | 1.9 | 0.4 | setosa | |
| 4.8 | 3.0 | 1.4 | 0.3 | setosa | |
| 5.1 | 3.8 | 1.6 | 0.2 | setosa | |
| 4.6 | 3.2 | 1.4 | 0.2 | setosa | |
| 5.3 | 3.7 | 1.5 | 0.2 | setosa | |
| 5.0 | 3.3 | 1.4 | 0.2 | setosa | |
| 7.0 | 3.2 | 4.7 | 1.4 | versicolor | |
| 6.4 | 3.2 | 4.5 | 1.5 | versicolor | |
| 6.9 | 3.1 | 4.9 | 1.5 | versicolor | |
| 5.5 | 2.3 | 4.0 | 1.3 | versicolor | |
| 6.5 | 2.8 | 4.6 | 1.5 | versicolor | |
| 5.7 | 2.8 | 4.5 | 1.3 | versicolor | |
| 6.3 | 3.3 | 4.7 | 1.6 | versicolor | |
| 4.9 | 2.4 | 3.3 | 1.0 | versicolor | |
| 6.6 | 2.9 | 4.6 | 1.3 | versicolor | |
| 5.2 | 2.7 | 3.9 | 1.4 | versicolor | |
| 5.0 | 2.0 | 3.5 | 1.0 | versicolor | |
| 5.9 | 3.0 | 4.2 | 1.5 | versicolor | |
| 6.0 | 2.2 | 4.0 | 1.0 | versicolor | |
| 6.1 | 2.9 | 4.7 | 1.4 | versicolor | |
| 5.6 | 2.9 | 3.6 | 1.3 | versicolor | |
| 6.7 | 3.1 | 4.4 | 1.4 | versicolor | |
| 5.6 | 3.0 | 4.5 | 1.5 | versicolor | |
| 5.8 | 2.7 | 4.1 | 1.0 | versicolor | |
| 6.2 | 2.2 | 4.5 | 1.5 | versicolor | |
| 5.6 | 2.5 | 3.9 | 1.1 | versicolor | |
| 5.9 | 3.2 | 4.8 | 1.8 | versicolor | |
| 6.1 | 2.8 | 4.0 | 1.3 | versicolor | |
| 6.3 | 2.5 | 4.9 | 1.5 | versicolor | |
| 6.1 | 2.8 | 4.7 | 1.2 | versicolor | |
| 6.4 | 2.9 | 4.3 | 1.3 | versicolor | |
| 6.6 | 3.0 | 4.4 | 1.4 | versicolor | |
| 6.8 | 2.8 | 4.8 | 1.4 | versicolor | |
| 6.7 | 3.0 | 5.0 | 1.7 | versicolor | |
| 6.0 | 2.9 | 4.5 | 1.5 | versicolor | |
| 5.7 | 2.6 | 3.5 | 1.0 | versicolor | |
| 5.5 | 2.4 | 3.8 | 1.1 | versicolor | |
| 5.5 | 2.4 | 3.7 | 1.0 | versicolor | |
| 5.8 | 2.7 | 3.9 | 1.2 | versicolor | |
| 6.0 | 2.7 | 5.1 | 1.6 | versicolor | |
| 5.4 | 3.0 | 4.5 | 1.5 | versicolor | |
| 6.0 | 3.4 | 4.5 | 1.6 | versicolor | |
| 6.7 | 3.1 | 4.7 | 1.5 | versicolor | |
| 6.3 | 2.3 | 4.4 | 1.3 | versicolor | |
| 5.6 | 3.0 | 4.1 | 1.3 | versicolor | |
| 5.5 | 2.5 | 4.0 | 1.3 | versicolor | |
| 5.5 | 2.6 | 4.4 | 1.2 | versicolor | |
| 6.1 | 3.0 | 4.6 | 1.4 | versicolor | |
| 5.8 | 2.6 | 4.0 | 1.2 | versicolor | |
| 5.0 | 2.3 | 3.3 | 1.0 | versicolor | |
| 5.6 | 2.7 | 4.2 | 1.3 | versicolor | |
| 5.7 | 3.0 | 4.2 | 1.2 | versicolor | |
| 5.7 | 2.9 | 4.2 | 1.3 | versicolor | |
| 6.2 | 2.9 | 4.3 | 1.3 | versicolor | |
| 5.1 | 2.5 | 3.0 | 1.1 | versicolor | |
| 5.7 | 2.8 | 4.1 | 1.3 | versicolor | |
| 6.3 | 3.3 | 6.0 | 2.5 | virginica | |
| 5.8 | 2.7 | 5.1 | 1.9 | virginica | |
| 7.1 | 3.0 | 5.9 | 2.1 | virginica | |
| 6.3 | 2.9 | 5.6 | 1.8 | virginica | |
| 6.5 | 3.0 | 5.8 | 2.2 | virginica | |
| 7.6 | 3.0 | 6.6 | 2.1 | virginica | |
| 4.9 | 2.5 | 4.5 | 1.7 | virginica | |
| 7.3 | 2.9 | 6.3 | 1.8 | virginica | |
| 6.7 | 2.5 | 5.8 | 1.8 | virginica | |
| 7.2 | 3.6 | 6.1 | 2.5 | virginica | |
| 6.5 | 3.2 | 5.1 | 2.0 | virginica | |
| 6.4 | 2.7 | 5.3 | 1.9 | virginica | |
| 6.8 | 3.0 | 5.5 | 2.1 | virginica | |
| 5.7 | 2.5 | 5.0 | 2.0 | virginica | |
| 5.8 | 2.8 | 5.1 | 2.4 | virginica | |
| 6.4 | 3.2 | 5.3 | 2.3 | virginica | |
| 6.5 | 3.0 | 5.5 | 1.8 | virginica | |
| 7.7 | 3.8 | 6.7 | 2.2 | virginica | |
| 7.7 | 2.6 | 6.9 | 2.3 | virginica | |
| 6.0 | 2.2 | 5.0 | 1.5 | virginica | |
| 6.9 | 3.2 | 5.7 | 2.3 | virginica | |
| 5.6 | 2.8 | 4.9 | 2.0 | virginica | |
| 7.7 | 2.8 | 6.7 | 2.0 | virginica | |
| 6.3 | 2.7 | 4.9 | 1.8 | virginica | |
| 6.7 | 3.3 | 5.7 | 2.1 | virginica | |
| 7.2 | 3.2 | 6.0 | 1.8 | virginica | |
| 6.2 | 2.8 | 4.8 | 1.8 | virginica | |
| 6.1 | 3.0 | 4.9 | 1.8 | virginica | |
| 6.4 | 2.8 | 5.6 | 2.1 | virginica | |
| 7.2 | 3.0 | 5.8 | 1.6 | virginica | |
| 7.4 | 2.8 | 6.1 | 1.9 | virginica | |
| 7.9 | 3.8 | 6.4 | 2.0 | virginica | |
| 6.4 | 2.8 | 5.6 | 2.2 | virginica | |
| 6.3 | 2.8 | 5.1 | 1.5 | virginica | |
| 6.1 | 2.6 | 5.6 | 1.4 | virginica | |
| 7.7 | 3.0 | 6.1 | 2.3 | virginica | |
| 6.3 | 3.4 | 5.6 | 2.4 | virginica | |
| 6.4 | 3.1 | 5.5 | 1.8 | virginica | |
| 6.0 | 3.0 | 4.8 | 1.8 | virginica | |
| 6.9 | 3.1 | 5.4 | 2.1 | virginica | |
| 6.7 | 3.1 | 5.6 | 2.4 | virginica | |
| 6.9 | 3.1 | 5.1 | 2.3 | virginica | |
| 5.8 | 2.7 | 5.1 | 1.9 | virginica | |
| 6.8 | 3.2 | 5.9 | 2.3 | virginica | |
| 6.7 | 3.3 | 5.7 | 2.5 | virginica | |
| 6.7 | 3.0 | 5.2 | 2.3 | virginica | |
| 6.3 | 2.5 | 5.0 | 1.9 | virginica | |
| 6.5 | 3.0 | 5.2 | 2.0 | virginica | |
| 6.2 | 3.4 | 5.4 | 2.3 | virginica | |
| 5.9 | 3.0 | 5.1 | 1.8 | virginica |
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| svg { | |
| font: 10px sans-serif; | |
| padding: 10px; | |
| } | |
| .axis, | |
| .frame { | |
| shape-rendering: crispEdges; | |
| } | |
| .axis line { | |
| stroke: #ddd; | |
| } | |
| .axis path { | |
| display: none; | |
| } | |
| .cell text { | |
| font-weight: bold; | |
| text-transform: capitalize; | |
| } | |
| .frame { | |
| fill: none; | |
| stroke: #aaa; | |
| } | |
| circle { | |
| fill-opacity: .7; | |
| } | |
| circle.hidden { | |
| fill: #ccc !important; | |
| } | |
| .extent { | |
| fill: #000; | |
| fill-opacity: .125; | |
| stroke: #fff; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| size = 230, | |
| padding = 20; | |
| var x = d3.scale.linear() | |
| .range([padding / 2, size - padding / 2]); | |
| var y = d3.scale.linear() | |
| .range([size - padding / 2, padding / 2]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom") | |
| .ticks(6); | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left") | |
| .ticks(6); | |
| var color = d3.scale.category10(); | |
| d3.csv("flowers.csv", function(error, data) { | |
| if (error) throw error; | |
| var domainByTrait = {}, | |
| traits = d3.keys(data[0]).filter(function(d) { return d !== "species"; }), | |
| n = traits.length; | |
| traits.forEach(function(trait) { | |
| domainByTrait[trait] = d3.extent(data, function(d) { return d[trait]; }); | |
| }); | |
| xAxis.tickSize(size * n); | |
| yAxis.tickSize(-size * n); | |
| var brush = d3.svg.brush() | |
| .x(x) | |
| .y(y) | |
| .on("brushstart", brushstart) | |
| .on("brush", brushmove) | |
| .on("brushend", brushend); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", size * n + padding) | |
| .attr("height", size * n + padding) | |
| .append("g") | |
| .attr("transform", "translate(" + padding + "," + padding / 2 + ")"); | |
| svg.selectAll(".x.axis") | |
| .data(traits) | |
| .enter().append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", function(d, i) { return "translate(" + (n - i - 1) * size + ",0)"; }) | |
| .each(function(d) { x.domain(domainByTrait[d]); d3.select(this).call(xAxis); }); | |
| svg.selectAll(".y.axis") | |
| .data(traits) | |
| .enter().append("g") | |
| .attr("class", "y axis") | |
| .attr("transform", function(d, i) { return "translate(0," + i * size + ")"; }) | |
| .each(function(d) { y.domain(domainByTrait[d]); d3.select(this).call(yAxis); }); | |
| var cell = svg.selectAll(".cell") | |
| .data(cross(traits, traits)) | |
| .enter().append("g") | |
| .attr("class", "cell") | |
| .attr("transform", function(d) { return "translate(" + (n - d.i - 1) * size + "," + d.j * size + ")"; }) | |
| .each(plot); | |
| // Titles for the diagonal. | |
| cell.filter(function(d) { return d.i === d.j; }).append("text") | |
| .attr("x", padding) | |
| .attr("y", padding) | |
| .attr("dy", ".71em") | |
| .text(function(d) { return d.x; }); | |
| cell.call(brush); | |
| function plot(p) { | |
| var cell = d3.select(this); | |
| x.domain(domainByTrait[p.x]); | |
| y.domain(domainByTrait[p.y]); | |
| cell.append("rect") | |
| .attr("class", "frame") | |
| .attr("x", padding / 2) | |
| .attr("y", padding / 2) | |
| .attr("width", size - padding) | |
| .attr("height", size - padding); | |
| cell.selectAll("circle") | |
| .data(data) | |
| .enter().append("circle") | |
| .attr("cx", function(d) { return x(d[p.x]); }) | |
| .attr("cy", function(d) { return y(d[p.y]); }) | |
| .attr("r", 4) | |
| .style("fill", function(d) { return color(d.species); }); | |
| } | |
| var brushCell; | |
| // Clear the previously-active brush, if any. | |
| function brushstart(p) { | |
| if (brushCell !== this) { | |
| d3.select(brushCell).call(brush.clear()); | |
| x.domain(domainByTrait[p.x]); | |
| y.domain(domainByTrait[p.y]); | |
| brushCell = this; | |
| } | |
| } | |
| // Highlight the selected circles. | |
| function brushmove(p) { | |
| var e = brush.extent(); | |
| svg.selectAll("circle").classed("hidden", function(d) { | |
| return e[0][0] > d[p.x] || d[p.x] > e[1][0] | |
| || e[0][1] > d[p.y] || d[p.y] > e[1][1]; | |
| }); | |
| } | |
| // If the brush is empty, select all circles. | |
| function brushend() { | |
| if (brush.empty()) svg.selectAll(".hidden").classed("hidden", false); | |
| } | |
| }); | |
| function cross(a, b) { | |
| var c = [], n = a.length, m = b.length, i, j; | |
| for (i = -1; ++i < n;) for (j = -1; ++j < m;) c.push({x: a[i], i: i, y: b[j], j: j}); | |
| return c; | |
| } | |
| </script> |
Answer in SO... thanks to Lars Kotthoff
L75 have to be changed into:
domainByTrait[trait] = d3.extent(data, function(d) { return +d[trait]; });
Regards.
On Firefox 63.0.1, at the start of a brush gesture, the overlay rect is offset from the center of the mouse pointer. This offset disappears by removing the svg padding.
Not reproduced on Chrome 70.
duplicate in SO: http://stackoverflow.com/questions/19708380/d3-js-scatter-matrix-with-brushing-scale-error
I try to reuse this example of 'scatter matrix with brushing'. The code seems to be pretty reusable but there is some scale problems...
Scales seems to be somehow hard coded or so: i change the csv by adding 10 to 75% of the first column values, and the x / y scales are not directly updated. To visualize the problem, see the fork of the gist: http://bl.ocks.org/fdeheeger/7249196
I cannot figure out where/how the scale is computed or updated in the javascript code.
I do not want to take your time, just point you this problem in case you are not aware of.