csv data to nested json tree in d3

Question

I have a csv data file which looks like this

root,y,i,5
root,c,b,a,7
root,c,b,z,2

I\'d like to generate something similar to the flare.json data file like

Answer 1

I would use the d3 nest function to accomplish this. You can find documentation on how to use it here: http://bl.ocks.org/phoebebright/raw/3176159/

The solution would look something like this:

var nested_data = d3.nest()
  .key(function(d) { return d[0]; })
  .key(function(d) { return d[1]; })
  .entries(csv_data);