DC.js 图表中的初始范围选择 [英] Initial Range selection in DC.js chart

问题描述

我想在一些 dc.js 图表(条形图和折线图)中进行初始范围选择.
所以我添加这个，例如:

I would like to make an initial range selection in some dc.js charts (bar and line).
So I add this for example:

.filter([7,10])

范围在图表上显示得很好，但显然选择了 0 个观测值.
我预计会选择几千个观察结果.就像我用画笔手动选择范围 [7,10] 一样.

And the range appears well on the chart, but apparently 0 observations are selected.
I expected a few thousands observations selected. Like it does when I select the range [7,10] manually with the brush.

关于我在这里缺少什么的任何提示?

Any hint on what I'm missing here?

我的部分代码:

    var chart_globalscore = dc.barChart('#chart_globalscore');
(...)
    var ndx = crossfilter(data_movies)
        ,all = ndx.groupAll()
(...)
        ,GlobalScoreDimension = ndx.dimension(function(d) { if ( !isNaN(d.GlobalScore) ) {return Math.round(d.GlobalScore*10)/10 ;} else {return -1;} })
        ,GlobalScoreGroup = GlobalScoreDimension.group()
(...)
        ;
(...)
    chart_globalscore
        .width(width001)
        .height(height001)
        .margins(margins)
        .dimension(GlobalScoreDimension)
        .group(GlobalScoreGroup)
        .round(function(val){return Math.round(val*10)/10;})
        .x(d3.scale.linear().domain([0, 10.1]))
        .filter([7,10])
        .centerBar(false)
        .transitionDuration(transitionDuration)
        .elasticY(true)
        .gap(1)
        .xUnits(function(){return 100;})
        .renderHorizontalGridLines(true)
        .yAxis().ticks(2)
        ;

推荐答案

dc.js 中的过滤器代码有点棘手.如果您指定一个值数组，它不会将该数组解释为一个范围.(它将数组解释为单个值，或者如果数组包含另一个数组，它将过滤该数组内的值.)

The filter code is a bit tricky in dc.js. If you specify an array of values, it will not interpret the array as a range. (It will either interpret the array as a single value, or if the array contains another array, it will filter on the values inside that array.)

尝试指定一个 范围过滤器对象 代替:

Try specifying a ranged filter object instead:

    .filter(dc.filters.RangedFilter(7, 10))

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