ChartDirector Ver 4.1 (ColdFusion Edition)
ArrayMath
.expAvg
Usage
expAvg(smoothingFactor)
Description
Replaces each element of the ArrayMath object by its exponential average.
The exponential average is computed by :
avg(n) = value(n) * smoothingFactor + avg(n - 1) * (1 - smoothingFactor)
where avg(n) is the exponential average of the nth element, and value(n) is the value of the nth element.
For the first element (n = 0), its exponential average is assumed to be equal to its original value.
Arguments
Argument
Default
Description
smoothingFactor
(Mandatory)
The smoothing factor used for computing exponential average. It should be between 0 - 1.
Return Value
The current ArrayMath object.
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