source: Dev/trunk/src/client/dojox/math/tests/stats.js

dojo.provide("dojox.math.tests.stats");
dojo.require("dojox.math.stats");

(function(){
        var epsilon = 1e-6;
                eq = function(t, a, b){
                        t.t(!isNaN(a) && ! isNaN(b));
                        var delta = Math.abs((a - b) / (a + b));
                        t.t(isNaN(delta) || delta < epsilon);
                },
                a1 = [1, 2, 1],
                a2 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
                a3 = [0, 5, 4, 5, 8, 20, 21, 20, 20, 8, 9, 15, 12, 11, 18, 7, 19, 13, 13, 4];
        tests.register("dojox.math.stats.tests", [
                function sd(t){
                        t.assertEqual(6.335613624582861, dojox.math.stats.sd(a3));
                },
                function variance(t){
                        t.assertEqual(40.139999999999986, dojox.math.stats.variance(a3));
                },
                function mean(t){
                        t.assertEqual(11.6, dojox.math.stats.mean(a3));
                },
                function min(t){
                        t.assertEqual(0, dojox.math.stats.min(a3));
                },
                function max(t){
                        t.assertEqual(21, dojox.math.stats.max(a3));
                },
                function median(t){
                        t.assertEqual(12, dojox.math.stats.median(a3));
                },
                function mode(t){
                        t.assertEqual(20, dojox.math.stats.mode(a3));
                },
                function sum(t){
                        t.assertEqual(232, dojox.math.stats.sum(a3));
                }
        ]);

        var points = [
                {x:1, y:42}, {x:1, y:7}, {x:2, y:17}, {x:4, y:41},
                {x:5, y:60}, {x:7, y:19}, {x:7, y:16}, {x:8, y:15},
                {x:10, y:29}, {x:11, y:1}, {x:12, y:10}, {x:13, y:22},
                {x:13, y:16}, {x:14, y:29}, {x:20, y:37}, {x:21, y:10},
                {x:21, y:60}, {x:22, y:4}, {x:22, y:33}, {x:25, y:52},
                {x:25, y:32}, {x:25, y:18}, {x:27, y:46}, {x:28, y:2},
                {x:28, y:56}, {x:29, y:12}, {x:32, y:53}, {x:32, y:14},
                {x:36, y:18}, {x:37, y:23}, {x:38, y:18}, {x:45, y:37},
                {x:48, y:43}, {x:50, y:9}, {x:53, y:48}, {x:55, y:60},
                {x:55, y:28}, {x:57, y:19}, {x:58, y:48}, {x:58, y:29}
        ];
        tests.register("dojox.math.stats.tests.bestFit", [
                function bf(t){
                        var result = dojox.math.stats.bestFit(points);
                        console.log(result);
                        t.assertEqual(0.208, Math.round(result.slope*1000)/1000);
                        t.assertEqual(22.829, Math.round(result.intercept*1000)/1000);
                        t.assertEqual(0.045, Math.round(result.r2*1000)/1000);
                        t.assertEqual(0.212, Math.round(result.r*1000)/1000);
                }
        ]);
        tests.register("dojox.math.stats.tests.forecast", [
                function _42(t){
                        t.assertEqual(31.580951899655346, dojox.math.stats.forecast(points, 42));
                },
                function _54(t){
                        t.assertEqual(34.08152295859065, dojox.math.stats.forecast(points, 54));
                },
                function _201(t){
                        t.assertEqual(64.71351843054812, dojox.math.stats.forecast(points, 201));
                }
        ]);
        tests.register("dojox.math.stats.tests.approx", [
                function approx1(t){ eq(t, dojox.math.stats.approxLin(a1, 0), 1); },
                function approx2(t){ eq(t, dojox.math.stats.approxLin(a1, 0.5), 2); },
                function approx3(t){ eq(t, dojox.math.stats.approxLin(a1, 1), 1); },
                function approx4(t){ eq(t, dojox.math.stats.approxLin(a1, 0.25), 1.5); },
                function approx5(t){ eq(t, dojox.math.stats.approxLin(a1, 0.75), 1.5); },
                function approx6(t){ eq(t, dojox.math.stats.approxLin(a1, 0.1), 1.2); },
                function summary1(t){
                        var s = dojox.math.stats.summary(a1);
                        eq(t, s.min, 1);
                        eq(t, s.p10, 1);
                        eq(t, s.p25, 1);
                        eq(t, s.med, 1);
                        eq(t, s.p75, 1.5);
                        eq(t, s.p90, 1.8);
                        eq(t, s.max, 2);
                },
                function summary2(t){
                        var s = dojox.math.stats.summary(a2, true);
                        eq(t, s.min, 0);
                        eq(t, s.p10, 2);
                        eq(t, s.p25, 5);
                        eq(t, s.med, 10);
                        eq(t, s.p75, 15);
                        eq(t, s.p90, 18);
                        eq(t, s.max, 20);
                }
        ]);
})();