如何在d3js中更新分组的条形图 [英] How to update a grouped bar-chart in d3js
问题描述
在此 朋克车 中,我试图根据与新的csv数据更新条形的方式与 此 。
In this plunker I've attempted to update the bars based on new csv data in a similar fashion to this.
它将获取新数据并更新矩形,但不会删除先前的数据。
It fetches the new data and updates the rectangles but doesn't remove the previous data.
我不知道代码的哪一部分不能正常工作,在以前的尝试中,我省略了 .attr( transform,function(d){return translate( + x0(d.State )+,0);})
,并获得最左边的一组条形以更新和删除先前的数据,但其他组均未显示。
I have no idea what part of the code isn't working right, in a previous attempt I omitted .attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; })
and got the leftmost group of bars to update and remove previous data but none of the other groups were showing.
感谢任何帮助!
编辑::上传了一个工作示例 此处
Uploaded a working example here
以下是相关代码:
let bars = g.selectAll(".test")
.data(data)
bars = bars.enter().append("g")
.attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; })
.selectAll("rect")
.data(function(d) {
return keys.map(function(key) {
return {key: key, value: d[key]};
});
})
bars = bars
.enter().append("rect")
.attr("width", x1.bandwidth())
.attr("x", function(d) { return x1(d.key); })
.attr("fill", function(d) { return z(d.key); })
.merge(bars)
bars.transition()
.duration(750)
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); });
bars.exit().remove();
推荐答案
图表中的图层/组似乎并不根据新数据进行更新。您可以对酒吧的输入,更新和退出代码进行以下更改:
The layers/groups in the chart do not seem to update as per the new data. Here's some changes you could make to the bars' enter, update and exit code:
var barGroups = g.selectAll("g.layer").data(data);
barGroups.enter().append("g").classed('layer', true)
.attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; });
barGroups.exit().remove();
var bars = g.selectAll("g.layer").selectAll("rect")
.data(function(d) {
return keys.map(function(key) {
return {key: key, value: d[key]};
});
});
bars.enter().append("rect").attr("width", x1.bandwidth())
.attr("x", function(d) { return x1(d.key); })
.attr("fill", function(d) { return z(d.key); })
.transition().duration(750)
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); });
bars
.transition().duration(750)
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); });
bars.exit().remove();
因此,如果您查看代码,则首先处理钢筋组/层,然后再处理条,即矩形。让我知道这是否行不通。
So if you look at the code, bar groups/layers are being dealt with first and then the actual bars i.e. rectangles. Let me know if this doesn't work.
希望这会有所帮助。 :)
Hope this helps. :)
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