$perl example.pl not enough data to calculate ratio. not enough data to calculate ratio. PO/Fr ratio within spec: 15 PO/Fr ratio within spec: 15 PO/Fr ratio within spec: 7 PO/Fr ratio within spec: 6.22222222222222 PO/Fr ratio within spec: 6 PO/Fr ratio within spec: 6.25 PO/Fr ratio within spec: 6.77777777777778 PO/Fr ratio within spec: 7.57894736842105 PO/Fr ratio within spec: 8.51282051282051 PO/Fr ratio within spec: 9.59183673469388 PO/Fr ratio within spec: 7.09459459459459 PO/Fr ratio within spec: 5.85858585858586 PO/Fr ratio within spec: 9.11290322580645 PO/Fr ratio within spec: 13.4939759036145 DANGER WILL ROBINSON! PO/FR ratio out of spec! DANGER WILL ROBINSON! PO/FR ratio out of spec!