javascript - dc.js month chart uneven spacing between bars -

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i creating chart using dc.js , can see spacing between months different. notable between february , march because february has 28 days. how have spacing between months?

           chart                 //dimensions                 .height(250)                 .margins({top: 10, right: 50, bottom: 25, left: 50})                 //x-axis                 .x(d3.time.scale().domain(domain))                 .round(d3.time.month.round)                 .xunits(d3.time.months)                 .elasticx(true)                 .xaxispadding(20)                 //left y-axis                 .yaxislabel('dollars')                 .elasticy(true)                 .renderhorizontalgridlines(true)                 // right y-axis                 .rightyaxislabel('quantity')                 //composition                 .compose(composition)                  .brushon(false)                 .xaxis().tickformat(d3.time.format('%b %y'));

chart

i think forget set gap

  magnitudechart.width(480) //you should set chart width     .height(150)     .margins({top: 10, right: 10, bottom: 20, left: 40})     .dimension(magvalue)     .group(magvaluegroupcount)     .transitionduration(500)     .centerbar(true)         .gap(65) //set gap     .filter([3, 5])     .x(d3.scale.linear().domain([0.5, 7.5]))     .elasticy(true)     .xaxis().tickformat();

dc bar reference


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