/// <summary>
/// Calculates the Range of given samples.
/// </summary>
/// <param name="samples"></param>
/// <returns>NaN if range cannot be calculated, valid double range otherwise</returns>
public static RangeInfo Calculate(IReadOnlyList<double> samples)
{
var result = new RangeInfo(double.PositiveInfinity, double.NegativeInfinity);
if (samples.Count <= 0)
return result;
if (samples.Count == 1)
{
var x = samples[0];
result.Max = x;
result.Min = x;
return result;
}
for (int i = 0; i < samples.Count; i++)
{
var x = samples[i];
if (x.IsInfinityOrNaN())
continue;
if (result.Min.IsGreaterThan(x))
result.Min = x;
else if (result.Max.IsLessThan(x))
result.Max = x;
}
return result;
}
/// <summary>
/// Calculates the Range of given samples.
/// </summary>
/// <param name="samples"></param>
/// <returns>NaN if range cannot be calculated, valid double range otherwise</returns>
public static IObservable<RangeInfo> Calculate(IObservable<double> samples)
{
var result = new RangeInfo(double.PositiveInfinity, double.NegativeInfinity);
bool isFirst = true;
return samples.Select(x =>
{
if (isFirst)
{
isFirst = false;
if(x.IsInfinityOrNaN())
{
return result;
}
else
{
result.Min = x;
result.Max = x;
return result;
}
}
if (x.IsInfinityOrNaN())
{
// nothing to do here
}
else
{
if (result.Min.IsGreaterThan(x))
result.Min = x;
else if (result.Max.IsLessThan(x))
result.Max = x;
}
return result;
});
}