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