61 строка
1.5 KiB
JavaScript
61 строка
1.5 KiB
JavaScript
require("./../lib/env-js/envjs/node");
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require("./../d3");
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d3.json("tests/barley.json", function(barley) {
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var nest = d3.nest()
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.key(function(d) { return d.year; })
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.key(function(d) { return d.variety; })
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.key(function(d) { return d.site; });
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console.log("entries(year/variety/site):");
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console.log(stringify(nest.entries(barley.slice(5, 8))));
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console.log("");
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console.log("map(year/variety/site):");
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console.log(stringify(nest.map(barley.slice(5, 8))));
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console.log("");
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var nest = d3.nest()
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.key(function(d) { return d.year; })
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.rollup(sum);
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console.log("rollup(year):");
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console.log(stringify(nest.map(barley)));
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console.log("");
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var nest = d3.nest()
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.key(function(d) { return d.year; })
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.key(function(d) { return d.variety; })
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.rollup(sum);
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console.log("rollup(year/variety):");
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console.log(stringify(nest.map(barley)));
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console.log("");
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var nest = d3.nest()
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.key(function(d) { return d.variety; })
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.sortKeys(d3.ascending);
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console.log("sortKeys(variety):");
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console.log(stringify(nest.entries(barley.slice(5, 8))));
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console.log("");
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var nest = d3.nest()
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.key(function(d) { return d.year; })
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.sortValues(function(b, a) { return a.yield - b.yield; });
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console.log("sortValues(year):");
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console.log(stringify(nest.map(barley.slice(6, 12))));
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console.log("");
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});
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function sum(v) {
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return v.reduce(function(p, v) { return p + v.yield; }, 0);
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}
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function stringify(json) {
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return JSON.stringify(json, null, " ");
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}
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