How to merge colums of multiple text files into one csv file using PowerShell?

Question

I have got multiple measurement files with one column of numeric data each. (Update: The script should work for variable numbers of measurement files.)

Answer 1

Here's one way:

$files = Get-ChildItem D:\temp *.dat
$header = $files|foreach {$_.basename}
$content= $files | foreach { ,(gc $_.fullname) }

$lines = for($i=0; $i -lt $content[0].Count; $i++)
{
    $line = for($x=0; $x -lt $files.count; $x++)
    {
        $content[$x][$i]        
    }

    $line -join ','
}

$lines | ConvertFrom-Csv -Header $header | Export-Csv data.csv