d3.csv map data as an array

Question

I'm currently working with dc.js, crossfilter.js, and d3.js to render some visualizations. I've come across a post pretty similar to what I was looking for here Crossfilter query and here d3 csv data loading.

What i'm aiming to do is to parse my csv, and for a certain column, parse it as an array within each object row. for instance, i have:

my data currently comes out as:

[
{FY: 2011, proj_name: "project 1", category: "fruit", subcategory: "strawberry, mango", total: 1510},
{FY: 2011, proj_name: "project 2", category: "fruit", subcategory: "orange, mango", total: 100},
{FY: 2011, proj_name: "project 2", category: "vegetable", subcategory: "celery", total: 100}
]

but i'm looking to format the data as so:

[
{FY: 2011, proj_name: "project 1", category: "fruit", subcategory: ["strawberry", "mango"], total: 1510},
{FY: 2011, proj_name: "project 1", category: "fruit", subcategory: ["orange", "mango"], total: 100},
{FY: 2011, proj_name: "project 1", category: "vegetable", subcategory: ["celery"], total: 100}
]

Is this something I can just put in data.forEach(function (d)) ?

    d3.csv("data.csv", function(data) { 
    data.forEach(function (d) { 
        d.FY = +d.FY; 
        d.total = +d.total; 
        d.subcategory = d.subcategory.split(/,/); 
        }) 
    })

I don't think is correct and it simply isn't working, but what I'm getting at here is that it's something that needs to be done repetitively within this column specifically so that I can bucket the subcategories as tags later on.. Any thoughts/feedback?

Much thanks in advance

redmallard · Accepted Answer · 2013-10-25 02:44:37Z

2

D3 already has this covered, the format for d3.csv is: d3.csv(url[, accessor][, callback]) where accessor is a function called for each row in the csv to transform the data. Try this:

d3.csv("data.csv", function(d) { 
  return {
    FY: +d.FY,
    total: +d.total,
    category: d.category,
    subcategory: d.subcategory.split(/,/)
  };
});

answered Oct 25, 2013 at 2:44

redmallard

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