Nest Example

_.md

[ Launch: Nest Example ] c2b9e87acf6ed8b3a2d2 by axelson

config.json

{"description":"Nest Example","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"test.js":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"pingpong","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"ajax-caching":true,"thumbnail":"http://i.imgur.com/GTa7eE4.png"}

inlet.js

var data = [{year: 2007, sub: 'MATH', school: 'Iolani', sgp: 50, poor: 10},
            {year: 2007, sub: 'READ', school: 'Iolani', sgp: 20, poor: 5}];

var by_school = d3.nest()
	.key(function(d) { return d.school; })
	.entries(data)

var by_school_w_rollup = d3.nest()
	.key(function(d) { return d.school; })
	.rollup(function(values) {
      return {sgp: d3.mean(values, function(d) { return d.sgp; }),
              poor: d3.mean(values, function(d) { return d.poor; })};
    });

console.log('by school2: ' + JSON.stringify(by_school_w_rollup));
d3.select('svg').append('text')
	.text(JSON.stringify(by_school))
	.attr('x', 100)
	.attr('y', 100);