Gist using the object pipeline to calculate a moving average

MovingAverage.ps1

function Get-MovingAverage {
    <#
    .SYNOPSIS
        Gets a moving average.
    .DESCRIPTION
        Gets a moving average of numbers passed to it.
    #>
    [Alias('MovingAverage')]
    param(
    # The number we're averaging.
    [Parameter(ValueFromPipeline)]
    [double]
    $Number
    )    

    begin {
        [double]$total = 0 
        [long]$runningCount = 0
    }

    process {
        $runningCount++    
        $total += $Number
         
        $total / $runningCount 
    }
}


1..5 | MovingAverage 

1..10 | Get-Random -Count 10 | MovingAverage