public static IEnumerable <double> AverageWindow(this IEnumerable <double> samples, int WindowLength)
{
if (samples is null)
{
throw new ArgumentNullException(nameof(samples));
}
switch (WindowLength)
{
case < 1: throw new ArgumentOutOfRangeException(nameof(WindowLength), WindowLength, "Длина окна должна быть больше 0");
case 1:
{
foreach (var sample in samples)
{
yield return(sample);
}
yield break;
}
}
var average = new AverageValue(WindowLength);
foreach (var sample in samples)
{
yield return(average.AddValue(sample));
}
}
public void AddValue_Test()
{
const int count = 10;
var data = Enumerable.Range(0, count).Select(n => (double)n).ToArray();
var average = data.Average();
var average_value = new AverageValue();
foreach (var v in data)
{
average_value.AddValue(v);
}
Assert.AreEqual(average, average_value.Value);
}
public void RollingAverage_Test()
{
const int count = 10;
var data = Enumerable.Range(0, count).Select(n => (double)n).ToArray();
var average_value = new AverageValue();
var expected = new double[data.Length];
var actual = new double[data.Length];
for (var i = 0; i < data.Length; i++)
{
actual[i] = average_value.AddValue(data[i]);
expected[i] = data.Take(i + 1).Average();
}
CollectionAssert.AreEqual(expected, actual);
}
public static IEnumerable <float> RollingAverage([NotNull] this IEnumerable <float> collection, int length)
{
var average = new AverageValue(length);
return(collection.Select(value => (float)average.AddValue(value)));
}