The problem is how you create the @slopes and @steep_grads arrays, you're assigning to them, which is not what you want. Instead you want to be using the push function e.g 
while (($key2, $value2) = each (%gradient_hash)) {
  if (($value2 > 0.1) || ($value2 < -0.1)) {
    push @steep_grads, $key2 . '?' . $value2;
    push @slopes, $value2;
  }
}

[download]
This pushes the value onto the array, which looks to be desired behaviour. So hopefully now your code should do the right thing :)
HTH

_________
broquaint

In reply to Re: going loopy by broquaint
in thread going loopy by Anonymous Monk

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