This program is made in order to test the fill function and the gradient utility
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April 10, 2017 15:09
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Randomly Generated Gradient Fill Graph
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <svg width="960" height="500"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var svg = d3.select("svg"), | |
| margin = {top: 20, right: 20, bottom: 30, left: 50}, | |
| width = +svg.attr("width") - margin.left - margin.right, | |
| height = +svg.attr("height") - margin.top - margin.bottom, | |
| g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| var parseTime = d3.timeParse("%d-%b-%y"); | |
| var x = d3.scaleTime() | |
| .rangeRound([0, width]); | |
| var y = d3.scaleLinear() | |
| .rangeRound([height, 0]); | |
| n_years_=10; | |
| today = new Date(); | |
| begin = today.getFullYear(); | |
| end = begin+ n_years_; | |
| begin = new Date(begin.toString()); | |
| end = new Date(end.toString()); | |
| array_dates = d3.timeYears(begin,end); | |
| data = [] | |
| for(i=0; i<array_dates.length;i++){ | |
| data.push({"date":array_dates[i], | |
| "open":Math.random()+1, | |
| "close":Math.random()+2, | |
| }) | |
| } | |
| x.domain(d3.extent(data, function(d) { return d.date; })); | |
| y.domain([0, d3.max(data, function(d) { return d.close; })]); | |
| var area = d3.area() | |
| .x(function(d) { return x(d.date); }) | |
| .y1(function(d) { return y(d.close); }) | |
| .y0(function(d) { return y(d.open); }); | |
| svg.append("linearGradient") | |
| .attr("id", "temperature-gradient") | |
| .attr("gradientUnits", "userSpaceOnUse") | |
| .attr("x1", 0).attr("y1", y(1)) | |
| .attr("x2", 0).attr("y2", y(3)) | |
| .selectAll("stop") | |
| .data([ | |
| {offset: "0%", color: d3.rgb("red").darker(2.5)}, | |
| {offset: "60%", color: "red"}, | |
| {offset: "100%", color: "red"} | |
| ]) | |
| .enter().append("stop") | |
| .attr("offset", function(d) { return d.offset; }) | |
| .attr("stop-color", function(d) { return d.color; }); | |
| g.append("path") | |
| .datum(data) | |
| .attr("class","area") | |
| .style("fill", "url(#temperature-gradient)") | |
| .attr("d", area); | |
| g.append("g") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(d3.axisBottom(x)); | |
| g.append("g") | |
| .call(d3.axisLeft(y)) | |
| .append("text") | |
| .attr("fill", "#000") | |
| .attr("transform", "rotate(-90)") | |
| .attr("y", 6) | |
| .attr("dy", "0.71em") | |
| .attr("text-anchor", "end") | |
| .text("Price ($)"); | |
| </script> |
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