Hi Robin, Isn't that obvious? It's because your denominator is zero. You can't compute anything with zero denominator. The result would be infinity.
Best Regards, Teerawat Issariyakul http://www.ns2ultimate.com/ http://www.facebook.com/pages/Teerawat-Issariyakul/358240861417 http://twitter.com/T_Bear http://www.t-issariyakul.blogspot.com http://www.ece.ubc.ca/~teerawat On Apr 5, 2012, at 12:02 AM, robin turna wrote: > > > i m using awk script to calculate values of certain parameters but it gives > me error: Fatal division by zero ,,can you help me regarding this. waiting > for reply > > with regards > robin > > BEGIN { > sends=0; > recvs=0; > > routing_packets=0.0; > droppedBytes=0; > droppedPackets=0; > highest_packet_id =0; > sum=0; > recvnum=0; > } > > { > time = $3; > packet_id = $41; > > # CALCULATE PACKET DELIVERY FRACTION > if (( > $1 == "s") && ( $35 == "cbr" ) && ( $19=="AGT" )) { sends++; } > > if (( $1 == "r") && ( $35 == "cbr" ) && ( $19=="AGT" )) { recvs++; } > > # CALCULATE DELAY > if ( start_time[packet_id] == 0 ) start_time[packet_id] = time; > if (( $1 == "r") && ( $35 == "cbr" ) && ( $19=="AGT" )) { > end_time[packet_id] = time; } > else { end_time[packet_id] = -1; } > > # CALCULATE TOTAL DSR OVERHEAD > if (($1 == "s" || $1 == "f") && $19 == "RTR" && $35 =="DSR") > routing_packets++; > > # DROPPED DSR PACKETS > if (( $1 == "d" ) && ( $35 == "cbr" ) && ( $3 > 0 )) > > { > droppedBytes=droppedBytes+$37; > droppedPackets=droppedPackets+1; > } > > #find the number of packets in the simulation > if (packet_id > highest_packet_id) > highest_packet_id = packet_id; > } > > END { > > for ( i in end_time ) > { > start = start_time[i]; > end = end_time[i]; > packet_duration = end - start; > if ( packet_duration > 0 ) > { sum += packet_duration; > recvnum++; > } > } > > > delay=sum/recvnum; > NRL = routing_packets/recvs; #normalized routing load > PDF = (recvs/sends)*100; #packet delivery ratio[fraction] > printf("send = %.2f\n",sends); > printf("recv = %.2f\n",recvs); > printf("routingpkts = %.2f\n",routing_packets++); > printf("PDF = %.2f\n",PDF); > printf("NRL = %.2f\n",NRL); > printf("Average e-e delay(ms)= %.2f\n",delay*1000); > printf("No. of dropped data (packets) = %d\n",droppedPackets); > printf("No. of dropped data (bytes) = %d\n",droppedBytes); > } >
