How to increment counter in gnu awk? - csv

Question

I want to be able to essentially print the line number along every printed line in the output after scanning and reworking an input csv file. The input csv file is comma separated, here's a sample
Timestamp,Email,Name,Year,Make,Model,Car_ID,Judge_ID,Judge_Name,Racer_Turbo,Racer_Supercharged,Racer_Performance,Racer_Horsepower,Car_Overall,Engine_Modifications,Engine_Performance,Engine_Chrome,Engine_Detailing,Engine_Cleanliness,Body_Frame_Undercarriage,Body_Frame_Suspension,Body_Frame_Chrome,Body_Frame_Detailing,Body_Frame_Cleanliness,Mods_Paint,Mods_Body,Mods_Wrap,Mods_Rims,Mods_Interior,Mods_Other,Mods_ICE,Mods_Aftermarket,Mods_WIP,Mods_Overall
8/5/2018 14:10,honoland13#japanpost.jp,Hernando,2015,Acura,TLX,48,J04,Bob,0,0,2,2,4,4,0,2,4,4,2,4,2,2,2,2,2,0,4,4,4,6,2,0,4
8/5/2018 15:11,nlighterness2q#umn.edu,Noel,2015,Jeep,Wrangler,124,J02,Carl,0,6,4,2,4,6,6,4,4,4,6,6,6,6,6,4,6,6,6,6,6,4,6,4,6
8/5/2018 17:10,eguest47#microsoft.com,Edan,2015,Lexus,Is250,222,J05,Adrian,0,0,0,0,0,0,0,0,6,6,6,0,0,6,6,6,0,0,0,0,0,0,0,0,4
8/5/2018 17:34,hchilley40#fema.gov,Hieronymus,1993,Honda,Civic eG,207,J06,Aaron,0,0,2,2,2,2,2,2,0,4,2,2,2,2,2,2,4,2,2,0,0,0,2,2,0
8/5/2018 14:30,nnowick3d#tuttocitta.it,Nickolas,2016,Ford,Mystang,167,J02,Carl,0,0,2,2,0,2,2,0,0,0,0,2,0,2,2,2,0,0,2,0,0,0,0,0,2
8/5/2018 16:12,mdearl39#amazon.co.uk,Martin,2013,Hyundai,Gen coupe,159,J04,Bob,0,0,2,0,0,0,2,0,0,0,0,2,0,2,2,0,2,0,2,0,0,0,0,0,0
8/5/2018 17:00,alynamg#blogtalkradio.com,Aldridge,2009,Infiniti,G37,20,J06,Aaron,2,0,2,2,0,0,2,0,0,2,2,2,2,2,2,2,2,2,4,2,2,0,2,0,2
What my code currently does is sift through the csv file, and pick out the car_id column, year, make, and model columns. Then it runs through every column from racer_turbo to the last, and for each row it adds up the values in those columns into a total value and prints that along side the other values (id, make, model, etc.). There is also a ranking column that precedes the other 5 when printed. Here is my code below.
BEGIN {
FS = ",";
OFS = "\t";
print "Ranking", "Car_ID", "Year", "Make", "Model", "Total";
}
FNR > 1 {
rank = 0;
total = 0;
if(NR > 1) {
for(i = 8; i < NF; i++) {
total += $i;
}
print ++rank,$7,$4,$5,$6,total;
}
}
END {
}
My current output is as follows
Ranking Car_ID Year Make Model Total
1 48 2015 Acura TLX 58
1 124 2015 Jeep Wrangler 118
1 222 2015 Lexus Is250 36
1 207 1993 Honda Civic eG 40
1 167 2016 Ford Mystang 18
1 159 2013 Hyundai Gen coupe 14
1 20 2009 Infiniti G37 36
1 178 2009 Honda Oddesy 66
My problem is that under the ranking column, it only shows 1 for each row, I need it to be able to increment starting at 1 and going down for as many lines as there are in the document. Right now as evident in my code, I have a rank variable that acts as a tracker that I want to increment up with each row printed, but it only prints 1 for each row. How can I fix that?
The expected output is this
Ranking Car_ID Year Make Model Total
1 48 2015 Acura TLX 58
2 124 2015 Jeep Wrangler 118
3 222 2015 Lexus Is250 36
4 207 1993 Honda Civic eG 40
5 167 2016 Ford Mystang 18
6 159 2013 Hyundai Gen coupe 14
7 20 2009 Infiniti G37 36
8 178 2009 Honda Oddesy 66
Please be advised, my machine is running version 4.0.2 of AWK.

Answer 1

You do not need own variable in this case, just subtract 1 from NR to get desired output, that is
BEGIN {
FS = ",";
OFS = "\t";
print "Ranking", "Car_ID", "Year", "Make", "Model", "Total";
}
FNR > 1 {
total = 0;
if(NR > 1) {
for(i = 8; i < NF; i++) {
total += $i;
}
print NR-1,$7,$4,$5,$6,total;
}
}
As side note: END is optional, you do not have to have one in GNU AWK command.