我有一個動態的數據源,經常在瀏覽器中創建一個新的json。更新d3與新的data.json餅圖
我能夠創建此JSON使用下面的代碼(也以this fiddle)餅圖
var data=[{"crimeType":"mip","totalCrimes":24},{"crimeType":"theft","totalCrimes":558},{"crimeType":"drugs","totalCrimes":81},{"crimeType":"arson","totalCrimes":3},{"crimeType":"assault","totalCrimes":80},{"crimeType":"burglary","totalCrimes":49},{"crimeType":"disorderlyConduct","totalCrimes":63},{"crimeType":"mischief","totalCrimes":189},{"crimeType":"dui","totalCrimes":107},{"crimeType":"resistingArrest","totalCrimes":11},{"crimeType":"sexCrimes","totalCrimes":24},{"crimeType":"other","totalCrimes":58}];
var width = 800,
height = 250,
radius = Math.min(width, height)/2;
var color = d3.scale.ordinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
var arc = d3.svg.arc()
.outerRadius(radius - 10)
.innerRadius(radius - 70);
var pie = d3.layout.pie()
.sort(null)
.value(function (d) {
return d.totalCrimes;
});
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width/2 + "," + height/2 + ")");
var g = svg.selectAll(".arc")
.data(pie(data))
.enter().append("g")
.attr("class", "arc");
g.append("path")
.attr("d", arc)
.style("fill", function (d) {
return color(d.data.crimeType);
});
g.append("text")
.attr("transform", function (d) {
return "translate(" + arc.centroid(d) + ")";
})
.attr("dy", ".35em")
.style("text-anchor", "middle")
.text(function (d) {
return d.data.crimeType;
});
該數據更新frequenty所以這將是更新餡餅的最佳方式?看看this fiddle。在這裏我有另一個叫做data2的json。
我怎麼可以簡單地用data2替換數據,並讓餅圖動畫/更新?
注:有些更新值可以== 0