D3.js直方图箱尺寸增量
[英]D3.js histogram bin size increments
问题描述
我试图创建救护车响应时间的直方图（以秒为单位）。 来自D3.js的示例代码非常有效。 我能够轻松地组合一个漂亮的直方图。 它甚至可以将响应时间（以秒为单位）转换为mm：ss格式。 我想要完成并需要你帮助的是这个; 如何使垃圾箱为60秒（1分钟）如果您运行以下代码，您将看到垃圾箱的增量为50秒。 这对大多数人来说是不直观的。 你会如何指定垃圾箱的确切数量？ 对于响应时间，我希望垃圾箱是1分钟（60秒），但对于在医院卸载病人我希望垃圾箱间隔5分钟（300秒）。 在这种情况下，我想请求您帮助使箱子成为精确值。 下面显示的是我的数据代码：
<!DOCTYPE html>
body {
font: 10px sans-serif;
}
.bar rect {
fill: thistle;
shape-rendering: crispEdges;
}
.bar text {
fill: black;
}
.axis path, .axis line {
fill: none;
stroke: cornsilk;
shape-rendering: crispEdges;
}
var values = [212,
279,
264,
411,
189,
343,
207,
424,
550,
302,
317,
315,
29,
227,
367,
163,
581,
96,
375,
313,
548,
570,
329,
269,
953,
238,
195,
183,
384,
353,
258,
465,
208,
273,
155,
344,
355,
354,
88,
364,
143,
407,
207,
437,
142,
234,
234,
193,
308,
416,
445,
327,
293,
327,
232,
319,
209,
498,
236,
427,
241,
164,
0,
157,
295,
337,
430,
218,
390,
231,
402,
301,
472,
349,
133,
311,
396,
452,
490,
189,
282,
297,
296,
413,
102,
219,
190,
371,
390,
454,
467,
302,
221,
547]
// Formatters for counts and times (converting numbers to Dates).
var formatCount = d3.format(",.0f"),
formatTime = d3.time.format("%H:%M"),
formatMinutes = function (d) {
return formatTime(new Date(2012, 0, 1, 0, d));
};
//this is the positioning of the chart
var margin = {top: 30, 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, 600])
.range([0, width]);
// These are the number of bins in the histogram.
var data = d3.layout.histogram()
.bins(x.ticks(10))
(values);
var y = d3.scale.linear()
.domain([0, d3.max(data, function (d) {
return d.y;
})])
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickFormat(formatMinutes);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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) + ")";
});
bar.append("rect")
.attr("x", 1)
.attr("width", x(data[0].dx) - 1)
.attr("height", function (d) {
return height - y(d.y);
});
//this block of code makes the tick values showing how many fall into the bin
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);
});
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
</script>
1 个解决方案
解决方案1
3 已采纳 2016-09-02 00:45:03
我会这样做的。 首先，手动计算你的滴答：
var ticks = d3.range(0, x.domain()[1] + 1, 60);
这将创建一个数组：
[0, 60, 120, 180, 240, 300, 360, 420, 480, 540, 600]
然后把它d3.histogram ：
var data = d3.layout.histogram()
.bins(ticks)
(values);
最后修复你的轴刻度：
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickValues(ticks)
.tickFormat(formatMinutes);
全部一起：
<!DOCTYPE html> <html> <head> <style> body { font: 10px sans-serif; } .bar rect { fill: thistle; shape-rendering: crispEdges; } .bar text { fill: black; } .axis path, .axis line { fill: none; stroke: cornsilk; shape-rendering: crispEdges; } </style> <script data-require="d3@3.5.3" data-semver="3.5.3" src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script> </head> <body> <script> var values = [212, 279, 264, 411, 189, 343, 207, 424, 550, 302, 317, 315, 29, 227, 367, 163, 581, 96, 375, 313, 548, 570, 329, 269, 953, 238, 195, 183, 384, 353, 258, 465, 208, 273, 155, 344, 355, 354, 88, 364, 143, 407, 207, 437, 142, 234, 234, 193, 308, 416, 445, 327, 293, 327, 232, 319, 209, 498, 236, 427, 241, 164, 0, 157, 295, 337, 430, 218, 390, 231, 402, 301, 472, 349, 133, 311, 396, 452, 490, 189, 282, 297, 296, 413, 102, 219, 190, 371, 390, 454, 467, 302, 221, 547 ] // Formatters for counts and times (converting numbers to Dates). var formatCount = d3.format(",.0f"), formatTime = d3.time.format("%H:%M"), formatMinutes = function(d) { return formatTime(new Date(2012, 0, 1, 0, d)); }; //this is the positioning of the chart var margin = { top: 30, 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, 600]) .range([0, width]); // These are the number of bins in the histogram. var ticks = d3.range(0, x.domain()[1] + 1, 60); var data = d3.layout.histogram() .bins(ticks) (values); var y = d3.scale.linear() .domain([0, d3.max(data, function(d) { return dy; })]) .range([height, 0]); var xAxis = d3.svg.axis() .scale(x) .orient("bottom") .tickValues(ticks) .tickFormat(formatMinutes); var svg = d3.select("body").append("svg") .attr("width", width + margin.left + margin.right) .attr("height", height + margin.top + margin.bottom) .append("g") .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); var bar = svg.selectAll(".bar") .data(data) .enter().append("g") .attr("class", "bar") .attr("transform", function(d) { return "translate(" + x(dx) + "," + y(dy) + ")"; }); bar.append("rect") .attr("x", 1) .attr("width", x(data[0].dx) - 1) .attr("height", function(d) { return height - y(dy); }); //this block of code makes the tick values showing how many fall into the bin 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(dy); }); svg.append("g") .attr("class", "x axis") .attr("transform", "translate(0," + height + ")") .call(xAxis); </script> </body> </html>
D3.js 直方图 - x 轴上的 Position 个标签和每个 bin 的数量
[英]D3.js Histogram - Position labels on x axis and quantities of each bin
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