D3.jsの日付に基づいてラインをx軸にするにはどうすればよいですか?
私は、d3.jsの使用方法を自習しようとしています。私はそれに付属する例を見て、jsonが提供するデータを使用して折れ線グラフを再作成しようと試みてきました。データを折れ線グラフにフィードすることはできますが、x軸は数値ではなく日付であると想定されています。私が使用している日付形式はMM/DD/YYですが、グラフは0ですべてをプロットします。私のjsonデータはうまくいきますが、x座標をプロットする方法がわかりません。これは、ダウンロード時にd3.jsサンプルフォルダーに含まれるline.jsから直接取得したものです。日付部分はトリックを行いません。誰かが例を示してくれるか、それを機能させる方法を説明できるようになることを望んでいます。
d3.json('jsonChartData.action',
function (data) {
console.log(data);
var w = 450,
h = 275,
p = 30,
x = d3.scale.linear().domain([0, 100]).range([0, w]),
y = d3.scale.linear().domain([0, 100]).range([h, 0]);
var vis = d3.select("body")
.data([data])
.append("svg:svg")
.attr("width", w + p * 2)
.attr("height", h + p * 2)
.append("svg:g")
.attr("transform", "translate(" + p + "," + p + ")");
var rules = vis.selectAll("g.rule")
.data(x.ticks(5))
.enter().append("svg:g")
.attr("class", "rule");
rules.append("svg:line")
.attr("x1", x)
.attr("x2", x)
.attr("y1", 0)
.attr("y2", h - 1);
rules.append("svg:line")
.attr("class", function(d) { return d ? null : "axis"; })
.attr("y1", y)
.attr("y2", y)
.attr("x1", 0)
.attr("x2", w + 1);
rules.append("svg:text")
.attr("x", x)
.attr("y", h + 3)
.attr("dy", ".71em")
.attr("text-anchor", "middle")
.text(x.tickFormat(10));
rules.append("svg:text")
.attr("y", y)
.attr("x", -3)
.attr("dy", ".35em")
.attr("text-anchor", "end")
.text(y.tickFormat(10));
vis.append("svg:path")
.attr("class", "line")
.attr("d", d3.svg.line()
.x(function(d) { return x(d3.time.days(new Date(d.jsonDate))); })
.y(function(d) { return y(d.jsonHitCount); }));
vis.selectAll("circle.line")
.data(data)
.enter().append("svg:circle")
.attr("class", "line")
.attr("cx", function(d) { return x(d3.time.days(new Date(d.jsonDate))); })
.attr("cy", function(d) { return y(d.jsonHitCount); })
.attr("r", 3.5);
});
私のアクションによって印刷されたJSON:
[{"jsonDate":"09\/22\/11","jsonHitCount":2,"seriesKey":"Website Usage"},`{"jsonDate":"09\/26\/11","jsonHitCount":9,"seriesKey":"Website Usage"},{"jsonDate":"09\/27\/11","jsonHitCount":9,"seriesKey":"Website Usage"},{"jsonDate":"09\/29\/11","jsonHitCount":26,"seriesKey":"Website Usage"},{"jsonDate":"09\/30\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"10\/03\/11","jsonHitCount":3,"seriesKey":"Website Usage"},{"jsonDate":"10\/06\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"10\/11\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"10\/12\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"10\/13\/11","jsonHitCount":1,"seriesKey":"Website Usage"},{"jsonDate":"10\/14\/11","jsonHitCount":5,"seriesKey":"Website Usage"},{"jsonDate":"10\/17\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"10\/18\/11","jsonHitCount":6,"seriesKey":"Website Usage"},{"jsonDate":"10\/19\/11","jsonHitCount":8,"seriesKey":"Website Usage"},{"jsonDate":"10\/20\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"10\/21\/11","jsonHitCount":4,"seriesKey":"Website Usage"},{"jsonDate":"10\/24\/11","jsonHitCount":1,"seriesKey":"Website Usage"},{"jsonDate":"10\/25\/11","jsonHitCount":1,"seriesKey":"Website Usage"},{"jsonDate":"10\/27\/11","jsonHitCount":3,"seriesKey":"Website Usage"},{"jsonDate":"11\/01\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"11\/02\/11","jsonHitCount":1,"seriesKey":"Website Usage"},{"jsonDate":"11\/03\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"11\/04\/11","jsonHitCount":37,"seriesKey":"Website Usage"},{"jsonDate":"11\/08\/11","jsonHitCount":1,"seriesKey":"Website Usage"},{"jsonDate":"11\/10\/11","jsonHitCount":39,"seriesKey":"Website Usage"},{"jsonDate":"11\/11\/11","jsonHitCount":1,"seriesKey":"Website Usage"},{"jsonDate":"11\/14\/11","jsonHitCount":15,"seriesKey":"Website Usage"},{"jsonDate":"11\/15\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"11\/16\/11","jsonHitCount":5,"seriesKey":"Website Usage"},{"jsonDate":"11\/17\/11","jsonHitCount":4,"seriesKey":"Website Usage"},{"jsonDate":"11\/21\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"11\/22\/11","jsonHitCount":3,"seriesKey":"Website Usage"},{"jsonDate":"11\/23\/11","jsonHitCount":11,"seriesKey":"Website Usage"},{"jsonDate":"11\/24\/11","jsonHitCount":2,"seriesKey":"Website Usage"},{"jsonDate":"11\/25\/11","jsonHitCount":1,"seriesKey":"Website Usage"},{"jsonDate":"11\/28\/11","jsonHitCount":10,"seriesKey":"Website Usage"},{"jsonDate":"11\/29\/11","jsonHitCount":3,"seriesKey":"Website Usage"}]`
日付にd3.scale.linear()
を使用しようとしていますが、機能しません。代わりにd3.time.scale()
を使用する必要があります( docs ):
// helper function
function getDate(d) {
return new Date(d.jsonDate);
}
// get max and min dates - this assumes data is sorted
var minDate = getDate(data[0]),
maxDate = getDate(data[data.length-1]);
var x = d3.time.scale().domain([minDate, maxDate]).range([0, w]);
次に、時間間隔関数を扱う必要はありません。x
に日付を渡すだけです。
.attr("d", d3.svg.line()
.x(function(d) { return x(getDate(d)) })
.y(function(d) { return y(d.jsonHitCount) })
);
ここで作業フィドル: http://jsfiddle.net/nrabinowitz/JTrnC/