excel - Mathmatically adding arrays in PowerShell -

i have 2 arrays need add (along later subtract , multiply). first labeled $agrp , contains data being pulled range in excel sheet. have $bgrp pulling range same excel sheet. add them mathematically. far, can them combine new array (now double size). suggestions?

if want treat arrays independently, can use this:

$egrp = new-object system.collections.arraylist  ($i=0; $i -lt $agrp.count; $i++){     $egrp += $agrp[$i] + $bgrp[$i] }  

although don't because it's not "powershell". here's suggest if need extracted directly csv:

$egrp = new-object system.collections.arraylist  import-csv $csv_path |  %{[int]$_.agrp + [int]$_.bgrp} |  %{$egrp += $_} 

note $_.agrp , $_.bgrp represent names of columns of csv (in first line). $csv_path string path or file object of csv.

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