An example of d3-contour.
Last active
March 6, 2019 05:25
-
-
Save mbostock/bf2f5f02b62b5b3bb92ae1b59b53da36 to your computer and use it in GitHub Desktop.
Contour Plot III
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| license: gpl-3.0 |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <svg width="960" height="500" stroke="#fff" stroke-width="0.5"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://d3js.org/d3-contour.v1.min.js"></script> | |
| <script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script> | |
| <script> | |
| // Populate a grid of n×m values where -9.6 ≤ x ≤ 9.6 and -5 ≤ y ≤ 5. | |
| var n = 240, m = 125, values = new Array(n * m); | |
| for (var j = 0.5, k = 0; j < m; ++j) { | |
| for (var i = 0.5; i < n; ++i, ++k) { | |
| values[k] = sinCos(i / n * 19.2 - 9.6, 5 - j / m * 10); | |
| } | |
| } | |
| var svg = d3.select("svg"), | |
| width = +svg.attr("width"), | |
| height = +svg.attr("height"); | |
| var color = d3.scaleSequential(d3.interpolateRdBu) | |
| .domain([-1, 1]); | |
| svg.selectAll("path") | |
| .data(d3.contours() | |
| .size([n, m]) | |
| (values)) | |
| .enter().append("path") | |
| .attr("d", d3.geoPath(d3.geoIdentity().scale(width / n))) | |
| .attr("fill", function(d) { return color(d.value); }); | |
| function sinCos(x, y) { | |
| return Math.sin(x + y) * Math.sin(x - y); | |
| } | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment