如何像d3一样在nvd3中添加画笔

Question

我正在 nvd3 中创建图表 FIDDLE

我已经完成了图形及其工作得很好但现在我想在其中添加 brush 就像 d3 看这个例子：http://bl.ocks.org/mbostock/1667367. but i searched every where, i found one solution i.e crossfilter 但是否可以像 d3 和 nvd3 一样使用刷子有任何刷功能？请帮我。

nv.addGraph(function() { var chart = nv.models.multiBarChart(); chart.xAxis .tickFormat(d3.format(',f')); chart.yAxis .tickFormat(d3.format(',.1f')); chart.multibar.stacked(true); // default to stacked chart.showControls(true); // don't show controls d3.select('#chart svg') .datum(test_data) .transition().duration(500).call(chart); nv.utils.windowResize(chart.update); return chart; });

Answer 1

I wonder how can you add brush using crossfilter?

这里的任何一种方法都是解决方案

nv.addGraph(function() {
    var chart = nv.models.multiBarChart();

    chart.xAxis
        .tickFormat(d3.format(',f'));

    chart.yAxis
        .tickFormat(d3.format(',.1f'));

    chart.multibar.stacked(true); // default to stacked
    chart.showControls(true); // don't show controls

    d3.select('#chart svg')
        .datum(test_data)
      .transition().duration(500).call(chart);




    var brushC  = d3.select('#chart svg g');

    brushC.empty() ? brushC.append('g'): brushC.select('g')
    .attr("class", "brush")
        .call(d3.svg.brush()        
            .x(chart.xAxis.scale())
            .on('brushend', onBrush)
            .extent([0,0])  

        )
        .selectAll('rect')
        .attr('height',320 )//change according to you chart height
         //i have hard coded it since it was a 'quick and dirty' fix
        //you may try to get it from chart, if you can please update me.
        ;
    }


 nv.utils.windowResize(chart.update);
        return chart;
    });

onBrush 函数

function onBrush() {
    brushExtent = d3.event.target.extent();
    console.log(brushExtent);
}

添加CSS

rect.extent{
    color:grey;
    opacity:0.4;
}

如何像d3一样在nvd3中添加画笔

how to add brush in nvd3 like d3

javascript

d3.js

nvd3.js