You're close; your second bit of code is changing the wrong index. You want:

#original (for the 1st column):
$y = 0;
for ($x = 0; $x < 15; $x++) {
    push @newips, $ips[$x][$y];
}
#new code, gets the second column
$y = 1;
for ($x = 0; $x < 15; $x++) {
    push @num, $ips[$x][$y];
}
[download]

Of course, you can simplify this by:

for ($x = 0; $x < 15; $x++) {
    push @newips, $ips[$x][0];
    push @num, $ips[$x][1];
}
[download]

(And there's many other optimizations/simplifications that could be done as well, but probably not worth going into at this time).

-----------------------------------------------------
Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain
"I can see my house from here!"
It's not what you know, but knowing how to find it if you don't know that's important