DC.js-顺序刻度线图的自定义排序 [英] DC.js - Custom ordering of ordinal scale line chart
问题描述
请原谅我的英语.
我正在尝试创建具有序数刻度和笔刷功能的折线图.由于此方法,我成功设置了序数上的笔刷: https://dc-js.github.io/dc. js/examples/brush-ordinal.html 现在,我需要设置x轴值的顺序.
I am trying to create a line chart with ordinal scale and brushon function. I successfully set brushing on ordinal thanks to this method : https://dc-js.github.io/dc.js/examples/brush-ordinal.html And now I need to set the x-axis values order.
我的数据是这样的:
[{"id_commune":4,"datation":"-30/-20","effectif":0.09,"commune":"Frejus","lieu_dit":"Les Aiguieres","departement":"83","pays":"FR","longitude":6.73703399,"latitude":43.433152,"quantite":1,"id_datation":1},
{"id_commune":4,"datation":"-20/-10","effectif":0.09,"commune":"Frejus","lieu_dit":"Les Aiguieres","departement":"83","pays":"FR","longitude":6.73703399,"latitude":43.433152,"quantite":1,"id_datation":2},
{"id_commune":4,"datation":"-10/1","effectif":0.09,"commune":"Frejus","lieu_dit":"Les Aiguieres","departement":"83","pays":"FR","longitude":6.73703399,"latitude":43.433152,"quantite":1,"id_datation":3},
{"id_commune":7,"datation":"20/30","effectif":0.33,"commune":"Nimes","lieu_dit":"Solignac","departement":"30","pays":"FR","longitude":4.36005399,"latitude":43.836699,"quantite":1,"id_datation":6},{"id_commune":6,"datation":"20\/30","effectif":0.6,"commune":"Muralto","lieu_dit":"Liverpool b","departement":"TI","pays":"CH","longitude":8.80560809,"latitude":46.1729618,"quantite":1,"id_datation":6},
{"id_commune":4,"datation":"20/30","effectif":0.09,"commune":"Frejus","lieu_dit":"Les Aiguieres","departement":"83","pays":"FR","longitude":6.73703399,"latitude":43.433152,"quantite":1,"id_datation":6},{"id_commune":1,"datation":"20/30","effectif":0.14,"commune":"Aislingen","lieu_dit":"NP","departement":"Lkr. Dillingen an der Donau BY","pays":"DE","longitude":10.4559987,"latitude":48.5065603,"quantite":1,"id_datation":6},]
我的交叉过滤器维度和组如下所示:
My crossfilter dimension and group look like this :
var ndx = crossfilter(records)
var graphDim = ndx.dimension(function(d) {return d.datation});
var graphGroup = graphDim.group().reduceSum(function(d) {return d.effectif;});
图表:
lineChart
.width(950)
.height(350)
.margins({top: 10, right: 50, bottom: 35, left: 30})
.dimension(graphDim)
.keyAccessor(function(kv) { return graphGroup.ord2int(kv.key); })
.group(graphGroup)
.x(d3.scaleLinear().domain(linear_domain))
.xAxisLabel("Chronologie")
.yAxisLabel("Effectif")
.brushOn(true)
.renderArea(true)
.renderHorizontalGridLines(true)
.renderVerticalGridLines(true)
.elasticY(true)
.yAxis().ticks(4);
现在,我明白了:
我要完成的结果是同一张图表,但x轴刻度值的排序如下: "-30/-20 -20/-10 -10/1 ..."
The result I am trying to accomplish is the same chart but with x-axis ticks values ordered like this : "-30/-20 -20/-10 -10/1 ..."
任何帮助表示赞赏.谢谢!
Any help appreciated. Thank you!
推荐答案
欢迎使用Stack Overflow.供以后参考,如果您可以包括一个可重现的示例(例如jsFiddle),则将有帮助.
Welcome to Stack Overflow. For future reference, it helps if you can include a reproducible example, for example a jsFiddle.
我理解您在做什么,因为我写了序数刷的示例,但是您没有包含所有代码,因此其他人不清楚.
I understood what you were doing because I wrote the ordinal brushing example, but you didn't include all the code, so it wouldn't be clear to others.
这是一个带有完整代码的小提琴,下面是相关代码:
Here is a fiddle with complete code, and here is the relevant code:
var graphDim = ndx.dimension(function(d) {return d.datation});
var graphGroup = graphDim.group().reduceSum(function(d) {return d.effectif;});
graphGroup = ordinal_to_linear_group(sort_group(graphGroup, function(a, b) {
return d3.descending(a.value, b.value);
}));
line = dc.lineChart('#line');
var linear_domain = [-0.5, data.length - 0.5];
line
.width(950)
.height(350)
.margins({top: 10, right: 50, bottom: 35, left: 30})
.dimension(graphDim)
.keyAccessor(function(kv) { return graphGroup.ord2int(kv.key); })
.group(graphGroup)
.x(d3.scaleLinear().domain(linear_domain))
.xAxisLabel("Chronologie")
.yAxisLabel("Effectif")
.brushOn(true)
.renderArea(true)
.renderHorizontalGridLines(true)
.renderVerticalGridLines(true)
.elasticY(true)
line.yAxis().ticks(4);
line.xAxis()
.tickValues(d3.range(data.length))
.tickFormat(function(d) { return graphGroup.int2ord(d); });
这是(不好的)结果:
顾名思义,sort_group()
创建一个按订购函数排序的伪造组.现在,它按值排序,从最高到最低:
As its name implies, sort_group()
creates a fake group sorted by the ordering function. Right now it's sorting by value, from highest to lowest:
sort_group(graphGroup, function(a, b) {
return d3.descending(a.value, b.value);
})
您似乎想按每个键的第一部分的数值排序.您可以相应地更改排序:
It looks like you want to sort by the numeric value of the first part of each key. You can change the sort accordingly:
sort_group(graphGroup, function(a, b) {
return d3.ascending(+a.key.split('/')[0], +b.key.split('/')[0]);
})
在使用d3.ascending
指定从低到高的排序之前,这会将每个键除以/
,然后获取第一项([0]
),然后将其转换为数字(+
).
This splits each key by /
, then takes the first item ([0]
), then converts it to a number (+
), before using d3.ascending
to specify sorting from low to high.
结果:
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