Example usage for org.apache.commons.math.stat.descriptive.rank Percentile Percentile

Introduction

In this page you can find the example usage for org.apache.commons.math.stat.descriptive.rank Percentile Percentile.

Prototype

public Percentile(Percentile original) 

Source Link

Document

Copy constructor, creates a new Percentile identical to the original

Usage

From source file:cc.recommenders.evaluation.data.BoxplotData.java

public double getPercentil(int percent) {
    refreshCache();/*  w  w  w  . j a  v  a 2 s.  c o  m*/
    Percentile p = new Percentile(percent);
    // sorting is implicitly done in the evaluate method
    return p.evaluate(dataAsCachedArray);
}

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From source file:com.eviware.loadui.util.statistics.ValueStatistics.java

public synchronized Map<String, Number> getData(long timestamp) {
    long max = 0;
    long min = Long.MAX_VALUE;
    long sum = 0;

    for (Iterator<DataPoint> it = dataPoints.iterator(); it.hasNext();) {
        DataPoint dataPoint = it.next();
        if (dataPoint.timestamp < timestamp - period && period > 0)
            it.remove();//from  www.  ja  v a  2 s.  c  o  m
        else {
            sum += dataPoint.value;
            max = Math.max(max, dataPoint.value);
            min = Math.min(min, dataPoint.value);
        }
    }

    int count = dataPoints.size();
    double avg = count > 0 ? (double) sum / count : 0;

    double stdDev = 0;
    double[] dataSet = new double[count];
    if (count > 0) {
        int i = 0;
        for (DataPoint dataPoint : dataPoints) {
            dataSet[i] = dataPoint.value;
            i++;
            stdDev += Math.pow(dataPoint.value - avg, 2);
        }
        stdDev = Math.sqrt(stdDev / count);
    }

    double tps = 0;
    long vps = 0;
    long duration = 0;
    if (count >= 2) {
        int samples = 0;
        long earliest = timestamp - snapshotLength;
        DataPoint point = null;
        while (++samples < count) {
            point = dataPoints.get(count - samples);
            vps += point.value;
            if (point.timestamp < earliest)
                break;
        }

        long timeDelta = timestamp - Preconditions.checkNotNull(point).timestamp;

        timeDelta = timeDelta == 0 ? 1000 : timeDelta;

        vps = vps * 1000 / timeDelta;
        tps = (samples - 1) * 1000.0 / timeDelta;
        duration = dataPoints.get(count - 1).timestamp - dataPoints.get(0).timestamp;
    }

    Percentile perc = new Percentile(90);

    double percentile = perc.evaluate(dataSet, 90);

    return new ImmutableMap.Builder<String, Number>() //
            .put("Max", max) //
            .put("Min", min == Long.MAX_VALUE ? 0L : min) //
            .put("Avg", avg) //
            .put("Sum", sum) //
            .put("Std-Dev", stdDev) //
            .put("Tps", tps) //
            .put("Avg-Tps", duration > 0L ? 1000L * count / duration : 0) //
            .put("Vps", vps) //
            .put("Avg-Vps", duration > 0L ? 1000L * sum / duration : 0) //
            .put("Percentile", percentile) //
            .put("AvgResponseSize", 1000L * sum / (dataPoints.size() == 0 ? 1 : dataPoints.size())) //
            .build();
}

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From source file:com.kylinolap.job.engine.JobEngine.java

public double getPercentileJobStepDuration(double percentile) {
    Collection<Double> values = JOB_DURATION.values();
    Double[] all = (Double[]) values.toArray(new Double[values.size()]);
    Percentile p = new Percentile(percentile);
    return p.evaluate(ArrayUtils.toPrimitive(all));
}

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