require("./../../lib/env-js/envjs/node");

require("./../../d3");

d3.json("test/barley.json", function(barley) {

var nest = d3.nest()

.key(function(d) { return d.year; })

.key(function(d) { return d.variety; })

.key(function(d) { return d.site; });

console.log("entries(year/variety/site):");

console.log(stringify(nest.entries(barley.slice(5, 8))));

console.log("");

console.log("map(year/variety/site):");

console.log(stringify(nest.map(barley.slice(5, 8))));

console.log("");

var nest = d3.nest()

.key(function(d) { return d.year; })

.rollup(sum);

console.log("rollup(year):");

console.log(stringify(nest.map(barley)));

console.log("");

var nest = d3.nest()

.key(function(d) { return d.year; })

.key(function(d) { return d.variety; })

.rollup(sum);

console.log("rollup(year/variety):");

console.log(stringify(nest.map(barley)));

console.log("");

var nest = d3.nest()

.key(function(d) { return d.variety; })

.sortKeys(d3.ascending);

console.log("sortKeys(variety):");

console.log(stringify(nest.entries(barley.slice(5, 8))));

console.log("");

var nest = d3.nest()

.key(function(d) { return d.year; })

.sortValues(function(b, a) { return a.yield - b.yield; });

console.log("sortValues(year):");

console.log(stringify(nest.map(barley.slice(6, 12))));

console.log("");

});

function sum(v) {

return v.reduce(function(p, v) { return p + v.yield; }, 0);

}

function stringify(json) {

return JSON.stringify(json, null, " ");

}