Get-RootMeanSquare

Ever needed to get the Root Mean Square of a set before? Me neither, but I went ahead and created a small function for it anyway.

Enjoy. 🙂

function Get-Square {
param([double]$Number)
$n = [math]::Abs($Number)
Write-Output ($n * $n)
}
#https://en.wikipedia.org/wiki/Root_mean_square
function Get-RootMeanSquare {
param ([double[]]$NumberSet)
$squaredNumberSet = New-Object System.Collections.ArrayList
foreach ($number in $NumberSet) {
[void]$squaredNumberSet.Add((Get-Square $number))
}
Write-Output ([math]::Sqrt((($squaredNumberSet | Measure-Object Average).Average)))
}

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