bootstrap: function()

in MotionMark/resources/statistics.js [394:421]

• 24 lines of code
• 3 McCabe index (conditional complexity)

    bootstrap: function(samples, iterationCount, processResample, confidencePercentage)
    {
        var sampleLength = samples.length;
        var resample = new Array(sampleLength);

        var bootstrapEstimator = new Experiment;
        var bootstrapData = new Array(iterationCount);

        Pseudo.resetRandomSeed();
        for (var i = 0; i < iterationCount; ++i) {
            for (var j = 0; j < sampleLength; ++j)
                resample[j] = samples[Math.floor(Pseudo.random() * sampleLength)];

            var resampleResult = processResample(resample);
            bootstrapEstimator.sample(resampleResult);
            bootstrapData[i] = resampleResult;
        }

        bootstrapData.sort(function(a, b) { return a - b; });
        return {
            confidenceLow: bootstrapData[Math.round((iterationCount - 1) * (1 - confidencePercentage) / 2)],
            confidenceHigh: bootstrapData[Math.round((iterationCount - 1) * (1 + confidencePercentage) / 2)],
            median: bootstrapData[Math.round(iterationCount / 2)],
            mean: bootstrapEstimator.mean(),
            data: bootstrapData,
            confidencePercentage: confidencePercentage
        };
    }