r - Single bar stacked chart in DC -

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i trying populate single column stacked bar chart. sum of 1 value stacked on other i.e. sum of 'lb' experiments stacked on 'random' experiments.

since need give dimension value chart have assumed dim variable 1 value both lb , random.

i getting above described data using following code:

d3.csv("file:///d:/optus/lars t&l/dashboard/html/dummy2.csv",function(error, experiments) {    var ndx                 = crossfilter(experiments), rdim        = ndx.dimension(function(d) {return d.dim;});  var lb = rdim.group().reducesum(function(d){return d.lbrandom=="lb"?d.contacted:0;}); var ran = rdim.group().reducesum(function(d){return d.lbrandom=="random"?d.contacted:0;});

although when trying plot data, browser displays the axis , no data plotted:

code plotting:

chart .width(768) .height(480) .x(d3.scale.ordinal()) .y(d3.scale.linear().domain([0,200000]))  .brushon(false) .dimension(rdim) .group(lb) .stack(ran) .render();   });

can me out this? it's 1st day working d3, dc & crossfilters libraries. thanks!


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