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Contents
require("../env");
require("../../d3");
var vows = require("vows"),
assert = require("assert");
var suite = vows.describe("d3.quantile");
suite.addBatch({
"quantile": {
topic: function() {
return d3.quantile;
},
"requires sorted numeric input": function(quantile) {
assert.equal(quantile([1, 2, 3, 4], 0), 1);
assert.equal(quantile([1, 2, 3, 4], 1), 4);
assert.equal(quantile([4, 3, 2, 1], 0), 4);
assert.equal(quantile([4, 3, 2, 1], 1), 1);
},
"uses the R-7 algorithm": function(quantile) {
var data = [3, 6, 7, 8, 8, 10, 13, 15, 16, 20];
assert.equal(quantile(data, 0), 3);
assert.equal(quantile(data, .25), 7.25);
assert.equal(quantile(data, .5), 9);
assert.equal(quantile(data, .75), 14.5);
assert.equal(quantile(data, 1), 20);
var data = [3, 6, 7, 8, 8, 9, 10, 13, 15, 16, 20];
assert.equal(quantile(data, 0), 3);
assert.equal(quantile(data, .25), 7.5);
assert.equal(quantile(data, .5), 9);
assert.equal(quantile(data, .75), 14);
assert.equal(quantile(data, 1), 20);
},
"returns an exact value for integer p-values": function(quantile) {
var a = {}, b = {}, c = {}, d = {}, data = [a, b, c, d];
assert.equal(quantile(data, 1/3), b);
assert.equal(quantile(data, 2/3), c);
},
"returns the first value for p = 0": function(quantile) {
var a = {}, b = {}, c = {}, d = {}, data = [a, b, c, d];
assert.equal(quantile(data, 0), a);
},
"returns the last value for p = 1": function(quantile) {
var a = {}, b = {}, c = {}, d = {}, data = [a, b, c, d];
assert.equal(quantile(data, 1), d);
}
}
});
suite.export(module);
Version data entries
31 entries across 31 versions & 2 rubygems