Powershell Array - same location combining

From the looks of it, you are trying to combine all the results into a single entry per site? e.g. - Total Analog Phones and Total IP Phones at each location.

If that is the case, you should be able to iterate through that array. Total the analog phones and IP phones per site, then use those values to populate a new array.

If you are looking for some code, we would have to know how the array is constructed to build the logic.

Something like this should work :

$result = @()

Function getIndex($location)
{
  for($j = 0; $j -lt $result.Count; $j++) {
    if($result[$j].Location -contains "$location") {
      $index=$j
      break;
    }
  }
  return $index
}

for ($i=0; $i -lt $outarray.length; $i++) {
  $loc=$outarray[$i].Location
  $aphones=$outarray[$i].'Analog Phones'
  $ipphones=$outarray[$i].'IP Phones'
  if(!($result | where-object {$_.Location -eq "$loc"})) {
    $result+=New-object psobject -property @{'Location' = "$loc"; 'Analog Phones' = $aphones; 'IP Phones' = $ipphones}  
    } else {
      $index=getIndex($loc) 
      $result[$index].'Analog Phones' = $result[$index].'Analog Phones' + $aphones
      $result[$index].'IP Phones' = $result[$index].'IP Phones' + $ipphones
   }
}
$result

$result output is :

Analog Phones      IP Phones     Location
-------------      ---------     --------
          413            887     Site1
          192            333     Site2

Here is the logic :

Define an empty $result array to store final results
Iterate over $outarray
  each time a location is found
     if location does not exists in $result then
        add full line from $outarray into $result for this location

     if location already exists in $result then
        retrieve the index for the given location in $result
        update Analog Phones number in $result with values from $outarray + $result for the given location (index)
        update IP Phones number in $result with values from $outarray + $result for the given location (index)

PS : i am not a Powershell Guru, so i think the getIndex could be improved. However, it worked for me based on your source code.

Hope it will help !

EDIT

Here is the way i have integrated my code into yours :

First i have created the $outarray like you (i think), except that i used hard coded values (not parsing a xml file) :

$outarray  = @()
$outarray+=New-object psobject -property @{'Analog Phones' = 0;'IP Phones' = 883;'Location' = "Site1"}
$outarray+=New-object psobject -property @{'Analog Phones' = 413;'IP Phones' = 0;'Location' = "Site1"}
$outarray+=New-object psobject -property @{'Analog Phones' = 0;'IP Phones' = 4;'Location' = "Site1"}
$outarray+=New-object psobject -property @{'Analog Phones' = 0;'IP Phones' = 258;'Location' = "Site2"}
$outarray+=New-object psobject -property @{'Analog Phones' = 9;'IP Phones' = 75;'Location' = "Site2"}
$outarray+=New-object psobject -property @{'Analog Phones' = 183;'IP Phones' = 0;'Location' = "Site2"}

From this point, my $outarray looks like this :

Analog Phones    IP Phones    Location
-------------    ---------    --------
            0          883    Site1
          413            0    Site1
            0            4    Site1
            0          258    Site2
            9           75    Site2
          183            0    Site2

Then i have added my code just after your export-csv command :

$outarray | Sort-Object............

MY CODE HERE

EDIT 2

I've found an issue with your actual code : numbers are interpreted as strings so they cannot be correctly calculated. You have to convert them into integers :

foreach($item in $finalxml){
  ...
  ...
  $outarray+=New-object psobject -property @{
        'Analog Phones' = [int]$item.analog_phones
        'IP Phones' = [int]$item.ip_phones
        'Location' = $location
    }
}