Porting d3.js histogram layout example to p5.js using d3.js tools and libraries as much as possible.
Original d3.js code: http://bl.ocks.org/mbostock/3048450
A Pen by Sepand Ansari on CodePen.
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January 8, 2023 19:12
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d3.js and p5.js
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| // port of http://bl.ocks.org/mbostock/3048450 into p5.js | |
| function setup() { | |
| /* | |
| This section of code is the exact copy of d3.js example | |
| */ | |
| // Generate a Bates distribution of 10 random variables. | |
| var values = d3.range(5000).map(d3.random.bates(10)); | |
| // A formatter for counts. | |
| var formatCount = d3.format(",.0f"); | |
| var margin = {top: 10, right: 30, bottom: 30, left: 30}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var x = d3.scale.linear() | |
| .domain([0, 1]) | |
| .range([0, width]); | |
| // Generate a histogram using twenty uniformly-spaced bins. | |
| var data = d3.layout.histogram() | |
| .bins(x.ticks(20)) | |
| (values); | |
| var y = d3.scale.linear() | |
| .domain([0, d3.max(data, function(d) { return d.y; })]) | |
| .range([height, 0]); | |
| /* | |
| up tp here the code is exactly the same as d3.js example. | |
| below p5.js translation starts. | |
| */ | |
| createCanvas(width, height); | |
| /* | |
| var bar = svg.selectAll(".bar") | |
| .data(data) | |
| .enter().append("g") | |
| .attr("class", "bar") | |
| .attr("transform", function(d) { return "translate(" + x(d.x) + "," + y(d.y) + ")"; }); | |
| */ | |
| for(var i = 0; i< data.length; i++) { | |
| var d = data[i]; | |
| push(); | |
| translate(x(d.x), y(d.y)); | |
| /* | |
| bar.append("rect") | |
| .attr("x", 1) | |
| .attr("width", x(data[0].dx) - 1) | |
| .attr("height", function(d) { return height - y(d.y); }); | |
| */ | |
| fill(70, 130, 180); | |
| noStroke(); | |
| rect(1, 1, x(data[0].dx) - 1, height - y(d.y) ); | |
| /* | |
| bar.append("text") | |
| .attr("dy", ".75em") | |
| .attr("y", 6) | |
| .attr("x", x(data[0].dx) / 2) | |
| .attr("text-anchor", "middle") | |
| .text(function(d) { return formatCount(d.y); }); | |
| */ | |
| fill(255); | |
| textAlign(CENTER); | |
| text(formatCount(d.y), x(data[0].dx) / 2, -2, x(data[0].dx), 20 ); | |
| pop(); | |
| /* | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis); | |
| */ | |
| // N/A in p5.js. | |
| } | |
| } | |
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| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.4.5/p5.js"></script> |
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