Thank you grep and BrowserUk.
below is a replacement for my first foreach statement which works better than my original code thanks to the suggestion by grep. 
my $f2 = $pos[1] - $pos[0];
my $f3 = $pos[2] - $pos[1];
my $f4 = $pos[3] - $pos[2];
my $f5 = $pos[4] - $pos[3];

foreach $line (@data) {
    my $pictureline = "a$pos[0] a$f2 a$f3 a$f4 a$f5";
    print unpack( $pictureline, $line ), "\n";
}

[download]
And thank you again BrowserUk for a more elegant solution altogether.

In reply to Re: Fixed Position Column Records by daseme
in thread Fixed Position Column Records by daseme

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