javascript - how to use crossfilter and dc.js to draw a cumulative distribution function lineChart -

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suppose have records this:

// origin: http://blog.rusty.io/2012/09/17/crossfilter-tutorial/ var livingthings = crossfilter([   // fact data.   { name: “rusty”,  type: “human”, legs: 2 },   { name: “alex”,   type: “human”, legs: 2 },   { name: “lassie”, type: “dog”,   legs: 4 },   { name: “spot”,   type: “dog”,   legs: 4 },   { name: “polly”,  type: “bird”,  legs: 2 },   { name: “fiona”,  type: “plant”, legs: 0 } ]);

let's want draw simple cdf based on legs variable using crossfilter , dc.js's linechart.

the expected chart points be:

x:0 --> y:0.16667 x:2 --> y:0.66667 x:4 --> y:1

but don't know how can implement this. please this? thanks!


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