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))) | |
| } |
