这是另一个StackOverflow problem的后续版本,其中在单个dc.js仪表板中创建了具有多个CSV的图表。
我按照说明进行操作,我的图表正在运行。但是,numberDisplay
元素不起作用。我怀疑的是,由于我要对两个CSV的总数进行制表,因此我不得不调整groupAll.reduceSum()
函数,但不确定如何。我的代码示例如下
//using queue.js to load data
var q = queue()
.defer(d3.csv, "data1.csv")
.defer(d3.csv, "data2.csv");
q.await(function(error, data1, data2){
//initiatizing crossfilter and ingesting data
var ndx = crossfilter();
ndx.add(data1.map(function(d){
return { age: d.age,
gender: d.gender,
scores: +d.scores,
total: +d.total,
type: 'data1'};
}));
ndx.add(data2.map(function(d){
return { age: d.age,
gender: d.gender,
scores: +d.scores,
total: +d.total,
type: 'data2'};
}));
//initializing charts
totalDisplay = dc.numberDisplay("#total-display");
totalScores = dc.numberDisplay("#total-scores");
//groupAll function to sum up the values
var scoresGroup = ndx.groupAll().reduceSum(function(d) {
d.scores;
});
var totalGroup = ndx.groupAll().reduceSum(function(d) {
d.total;
});
//parameters for the number display. Currently it is returning NaN
totalDisplay
.formatNumber(d3.format(","))
.valueAccessor(function(d) {
return d;
})
.group(totalGroup);
totalScores
.formatNumber(d3.format(",f"))
.valueAccessor(function(d) {
return d;
})
.group(scoresGroup);
任何帮助将不胜感激!
最佳答案
您需要使用return
才能从函数中返回值!
var scoresGroup = ndx.groupAll().reduceSum(function(d) {
d.scores;
});
var totalGroup = ndx.groupAll().reduceSum(function(d) {
d.total;
});
应该
var scoresGroup = ndx.groupAll().reduceSum(function(d) {
return d.scores;
});
var totalGroup = ndx.groupAll().reduceSum(function(d) {
return d.total;
});
否则,您最终将求和
undefined
并且undefined
不是数字。 :-)关于javascript - dc.js:带有多个CSV的ReduceSum,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/30948009/