/// <summary>
/// Tests if two objects are equal within given relative epsilon.
/// </summary>
/// <param name="epsilon">maximum allowed relative error (e.g. 0.01 for 1% accurancy)</param>
/// <returns>True if two objects are equal; false otherwise.</returns>
public bool NearlyEquals(StatisticsTSLock other, double epsilon = EDouble.RELATIVE_EPSILON)
{
if (other == null)
{
return(false);
}
lock (this._lock)
lock (other._lock)
return(this._count == other._count &&
this._mean.NearlyEquals(other._mean, epsilon) &&
this.q.NearlyEquals(other.q, epsilon) &&
this._min == other._min &&
this._max == other._max);
}
public StatisticsTSLock(StatisticsTSLock initialValue)
{
if (initialValue == null)
{
throw new ArgumentNullException("initialValue");
}
lock (initialValue._lock)
{
this._count = initialValue._count;
this._mean = initialValue._mean;
this.q = initialValue.q;
this._min = initialValue._min;
this._max = initialValue._max;
}
}
public void Add(StatisticsTSLock value)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
lock (this._lock)
{
if (value == this)
{
value = value.Clone();
}
var prevCount = this._count;
var prevMean = this._mean;
this._count += value._count;
this._mean += (value._mean - this._mean) * value._count / this._count;
// first add standard deviation given by difference between
// means of two object (it will be zero if the objects
// has the same mean)
this.q += value._count * (value._mean - prevMean) * (value._mean - this._mean);
// then simply add the standard deviation of other object
// (this won't change the resulting standard deviation if the
// two objects previously had the same standard deviation)
this.q += value.q;
this._standardDeviation = null;
this._sampleStandardDeviation = null;
if (value._min < this._min)
{
this._min = value._min;
}
if (this._max < value._max)
{
this._max = value._max;
}
}
}
