29 lines
1.3 KiB
C#
29 lines
1.3 KiB
C#
namespace Utils
|
|
{
|
|
public static class RollingAverage
|
|
{
|
|
/// <param name="currentAverage">Value of average before new value is added.</param>
|
|
/// <param name="newNumberOfValues">Number of values in average after new value is added.</param>
|
|
/// <param name="newValue">New value to be added.</param>
|
|
/// <returns>New average value.</returns>
|
|
/// <exception cref="Exception">newNumberOfValues must be 1 or greater.</exception>
|
|
public static float GetNewAverage(float currentAverage, int newNumberOfValues, float newValue)
|
|
{
|
|
if (newNumberOfValues < 1) throw new Exception("Should be at least 1 value.");
|
|
|
|
float n = newNumberOfValues;
|
|
var originalValue = currentAverage;
|
|
var originalValueWeight = ((n - 1.0f) / n);
|
|
var newValueWeight = (1.0f / n);
|
|
return GetWeightedAverage(originalValue, originalValueWeight, newValue, newValueWeight);
|
|
}
|
|
|
|
public static float GetWeightedAverage(float value1, float weight1, float value2, float weight2)
|
|
{
|
|
float totalWeight = weight1 + weight2;
|
|
if (totalWeight == 0.0f) return 0.0f;
|
|
return ((value1 * weight1) + (value2 * weight2)) / totalWeight;
|
|
}
|
|
}
|
|
}
|