/// <summary>
/// The constructor for the <see cref="LogarithmicEnumerator"/>
/// </summary>
/// <param name="histogram">The histogram this iterator will operate on</param>
/// <param name="valueUnitsInFirstBucket">the size (in value units) of the first value bucket step</param>
/// <param name="logBase">the multiplier by which the bucket size is expanded in each iteration step.</param>
public LogarithmicEnumerator(HistogramBase histogram, int valueUnitsInFirstBucket, double logBase) : base(histogram)
{
_logBase = logBase;
_nextValueReportingLevel = valueUnitsInFirstBucket;
_nextValueReportingLevelLowestEquivalent = histogram.LowestEquivalentValue(_nextValueReportingLevel);
}
/// <summary>
/// The constructor for the <see cref="LogarithmicEnumerator"/>
/// </summary>
/// <param name="histogram">The histogram this iterator will operate on</param>
/// <param name="valueUnitsInFirstBucket">the size (in value units) of the first value bucket step</param>
/// <param name="logBase">the multiplier by which the bucket size is expanded in each iteration step.</param>
public LogarithmicEnumerator(HistogramBase histogram, int valueUnitsInFirstBucket, double logBase) : base(histogram)
{
_logBase = logBase;
_nextValueReportingLevel = valueUnitsInFirstBucket;
_nextValueReportingLevelLowestEquivalent = histogram.LowestEquivalentValue(_nextValueReportingLevel);
}
public void TestScalingEquivalence()
{
Assert.AreEqual(
LongHistogram.GetMean() * 512,
ScaledHistogram.GetMean(), ScaledHistogram.GetMean() * 0.000001,
"averages should be equivalent");
Assert.AreEqual(
LongHistogram.TotalCount,
ScaledHistogram.TotalCount,
"total count should be the same");
Assert.AreEqual(
LongHistogram.LowestEquivalentValue(LongHistogram.GetValueAtPercentile(99.0)) * 512,
ScaledHistogram.LowestEquivalentValue(ScaledHistogram.GetValueAtPercentile(99.0)),
"99%'iles should be equivalent");
Assert.AreEqual(
ScaledHistogram.HighestEquivalentValue(LongHistogram.GetMaxValue() * 512),
ScaledHistogram.GetMaxValue(),
"Max should be equivalent for scaled data");
// Same for post-corrected:
Assert.AreEqual(
LongHistogram.GetMean() * 512,
ScaledHistogram.GetMean(), ScaledHistogram.GetMean() * 0.000001,
"averages should be equivalent");
Assert.AreEqual(
PostCorrectedHistogram.TotalCount,
PostCorrectedScaledHistogram.TotalCount,
"total count should be the same");
Assert.AreEqual(
PostCorrectedHistogram.LowestEquivalentValue(PostCorrectedHistogram.GetValueAtPercentile(99.0)) * 512,
PostCorrectedScaledHistogram.LowestEquivalentValue(PostCorrectedScaledHistogram.GetValueAtPercentile(99.0)),
"99%'iles should be equivalent");
Assert.AreEqual(
PostCorrectedScaledHistogram.HighestEquivalentValue(PostCorrectedHistogram.GetMaxValue() * 512),
PostCorrectedScaledHistogram.GetMaxValue(),
"Max should be equivalent for post-corrected data");
}
/// <summary>
/// The constructor for the <see cref="LinearEnumerator"/>
/// </summary>
/// <param name="histogram">The histogram this iterator will operate on</param>
/// <param name="valueUnitsPerBucket">The size (in value units) of each bucket iteration.</param>
public LinearEnumerator(HistogramBase histogram, int valueUnitsPerBucket) : base(histogram)
{
_valueUnitsPerBucket = valueUnitsPerBucket;
_nextValueReportingLevel = valueUnitsPerBucket;
_nextValueReportingLevelLowestEquivalent = histogram.LowestEquivalentValue(_nextValueReportingLevel);
}
public static long GetMinValue(this HistogramBase histogram)
{
var min = histogram.RecordedValues().FirstOrDefault().ValueIteratedTo;
return(histogram.LowestEquivalentValue(min));
}
