DC-js中的多系列条形图 [英] Multi-series bar chart in DC-js
问题描述
我使用 DC.js (在D3之上的lib),有一个单一系列条形图的一个很好的例子:
var xf = crossfilter(data);
var dim = xf.dimension(function(d){return d [EmployeeName];});
var group = dim.group()。reduceSum(function(d){return d [AverageSale];});
var chart = dc.barChart(elm);
chart.barPadding(0.1)
chart.outerPadding(0.05)
chart.brushOn(false)
chart.x(d3.scale.ordinal());
chart.xUnits(dc.units.ordinal);
chart.elasticY(true);
chart.dimension(dim).group(group);
chart.render();
但我想知道是否可以使用这个库创建一个多维条形图。例如:按商店名称分组,然后按员工分组,然后y轴显示平均销售价值(已由我的后端计算)。
数据如下:
[{
EmployeeName:Heather,
StoreName:Plaza,
AverageSaleValue:200
} {
EmployeeName:Mellisa,
StoreName:Plaza,
AverageSaleValue:240
} ,{
EmployeeName:Sarah,
StoreName:Oak Park,
AverageSaleValue:300
} ...] / code>
如果您有静态数量的图表组,效果与复合图表。
在下面的例子中,我硬编码条形图之间的差距 - 我可以这样做,因为我知道有12个月被显示。
var actuals = dc.barChart(compositeChart)
.gap(65)
.group(group)
。 valueAccessor(function(d){
return d.value.Actual;
});
var budgets = dc.barChart(compositeChart)
.gap(65)
.group(group)
.valueAccessor(function(d){
return d.value.Budget;
});
我将这些条形图传递给复合图表的compose方法:
compositeChart
.width(1000)
.height(300)
.dimension(monthDimension)
。 group(group)
.elasticY(true)
.x(d3.time.scale()。domain(timeExtent))
.xUnits(d3.time.months)
.bond(d3.time.month.round)
.renderHorizontalGridLines(true)
.compose([budget,actuals])
.brushOn(true);
最后,我添加一个renderlet来将其中一个图表向右移动几个像素: p>
compositeChart
.renderlet(function(chart){
chart.selectAll(g._1)。 attr(transform,translate(+ 1 +,0));
chart.selectAll(g._0 0));
});
我知道这不是最简单的方法,但它可以工作在夹点。
我希望这有助于。
I'm using DC.js ( lib on top of D3 ) and have a great example of a single series bar chart:
var xf = crossfilter(data);
var dim = xf.dimension(function (d) { return d["EmployeeName"]; });
var group = dim.group().reduceSum(function (d) { return d["AverageSale"]; });
var chart = dc.barChart(elm);
chart.barPadding(0.1)
chart.outerPadding(0.05)
chart.brushOn(false)
chart.x(d3.scale.ordinal());
chart.xUnits(dc.units.ordinal);
chart.elasticY(true);
chart.dimension(dim).group(group);
chart.render();
but I was wondering if it was possible to create a multi dimensional bar chart using this library. For example: Group by Store Name then Group By Employee then y-axis display average sale value ( already calculated by my backend ).
The data looks like:
[{
"EmployeeName": "Heather",
"StoreName" : "Plaza",
"AverageSaleValue": 200
}{
"EmployeeName": "Mellisa",
"StoreName" : "Plaza",
"AverageSaleValue": 240
}, {
"EmployeeName": "Sarah",
"StoreName" : "Oak Park",
"AverageSaleValue": 300
} ... ]
If you have a static number of groups to graph, you can achieve the desired effect with a composite chart.
In the example below, I hard coded the gap between the bar charts - I can do this because I know there are 12 months being displayed.
var actuals = dc.barChart(compositeChart)
.gap(65)
.group(group)
.valueAccessor(function (d) {
return d.value.Actual;
});
var budgets = dc.barChart(compositeChart)
.gap(65)
.group(group)
.valueAccessor(function (d) {
return d.value.Budget;
});
I pass these bar charts to the compose method of a composite chart:
compositeChart
.width(1000)
.height(300)
.dimension(monthDimension)
.group(group)
.elasticY(true)
.x(d3.time.scale().domain(timeExtent))
.xUnits(d3.time.months)
.round(d3.time.month.round)
.renderHorizontalGridLines(true)
.compose([budgets, actuals])
.brushOn(true);
Finally, I add a renderlet to move one of the charts to the right a few pixels:
compositeChart
.renderlet(function (chart) {
chart.selectAll("g._1").attr("transform", "translate(" + 20 + ", 0)");
chart.selectAll("g._0").attr("transform", "translate(" + 1 + ", 0)");
});
I know this isn't the cleanest approach but it can work in a pinch.
I hope this helps.
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