Powershell, how obtain a csv by column with a pscustomobject or ordered? - string

Question

Being a beginner in Powershell, I have a problem that I can't solve. I get the average of different CSV files as a string with the following code:
# recovery of the list of csv files present in the folder "folder_1".
$files=(Get-ChildItem -path "C:\folder_1\" -Recurse -Include *.csv)
#loop to read each file and average the variables "PRESS_CELL" and "PRESS_DELTA
foreach($file in $files){
$varTemp = #((Get-Content $file | ConvertFrom-Csv | Measure-Object "PRESS_CELL","PRESS_DELTA" -Average | Export-Csv -Path "C:\folder_1\Alias.csv" -NoTypeInformation -Append))
Write-Host $varTemp
}
#added an increment to sort the data (averages)
$vartemp2 = Import-CSV "C:\folder_1\Alias.csv" | Select *,LINENUMBER | ForEach-Object -Begin { $Line = 1 } {
$_.LineNumber = $Line++
$_
} | Export-CSV "C:\folder_1\Alias2.csv" -NoTypeInformation
Write-Host $vartemp2
# sort data by "property" and by "LINENUMBER"
$vartemp3 = Import-Csv "C:\folder_1\Alias2.csv"
$vartemp3 | % { $_.LINENUMBER = [int]$_.LINENUMBER }
$vartemp3 | Sort-Object -Property #{ Expression = 'Property'; Ascending = $true }, #{ Expression = 'LINENUMBER'; Ascending = $true } |
Format-Table -Property "Average","Property","LINENUMBER"
# groups the values obtained in a table/customobject and export it to csv by column ?
$fields = [ordered]#{
PRESS_CELL = $vartemp3 | ? property -like *PRESS_CELL* | Select -ExpandProperty Average
PRESS_DELTA = $vartemp3 | ? property -like *PRESS_DELTA* |Select -ExpandProperty Average
}
$fields | export-csv C:\1_ICOS_data\Alias4.csv -Append ##DOESN'T WORK
[result][1]
However, I would like to export the result as a CSV table (1 column per result with PRESS_CELL and PRESS_DELTA as headers. When I use the pipeline :
| export-csv C:\temp\alias.csv -Append
I get a result :
With "ordered"
"System.Collections.Specialized.OrderedDictionary+OrderedDictionaryKeyValueCollection","System.Collections.Specialized.OrderedDictionary+OrderedDictionaryKeyValueCollection","False","System.Object","False"
And with pscustomobject :
System.Object[],"System.Object[]"

Answer 1

Add -NoTypeInformation to export-csv command like that
$fields = [ordered]#{
PRESS_CELL = $vartemp3 | ? property -like *PRESS_CELL* | Select -ExpandProperty Average
PRESS_DELTA = $vartemp3 | ? property -like *PRESS_DELTA* |Select -ExpandProperty Average
}
#Or:
$fields = [pscustomobject]#{
PRESS_CELL = $vartemp3 | ? property -like *PRESS_CELL* | Select -ExpandProperty Average
PRESS_DELTA = $vartemp3 | ? property -like *PRESS_DELTA* |Select -ExpandProperty Average }
$fields |export-csv "c:\fields.csv" -Append -NoTypeInformation