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Sum function

 
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# 1  
Old 01-16-2014
Sum function
I have file input

Code:
China,Gaolian,9135774346294,AirAsia,0,0,0,0,0,0,0,0,0,0,0,0,0,0,165
India,Gangga,9135770291502,AirAsia,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3325
India,Nahdit,9135766545904,AirAsia,0,0,0,0,0,0,0,0,0,0,0,0,0,0,440
India,Kathman,9135768476591,AirAsia,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
China,Liong,9135779924879,AirAsia,0,0,0,0,0,0,0,0,0,0,7000,0,0,0,0
China,Jongy,9135778222275,AirAsia,0,0,0,0,0,0,0,0,0,0,0,0,0,0,245
Korea,Seoul,9135769911459,AirAsia,0,0,0,0,0,0,0,0,0,0,0,0,0,0,100
India,Gangga,9135777596759,AirAsia,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
India,Hindus,913577679859,AirAsia,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0

I need to sum column 5 till column 19, expected output below

Code:
China,Gaolian,9.13577E+12,AirAsia,165
India,Gangga,9.13577E+12,AirAsia,3325
India,Nahdit,9.13577E+12,AirAsia,440
India,Kathman,9.13577E+12,AirAsia,0
China,Liong,9.13578E+12,AirAsia,7000
China,Jongy,9.13578E+12,AirAsia,245
Korea,Seoul,9.13577E+12,AirAsia,100
India,Gangga,9.13578E+12,AirAsia,0
India,Hindus,9.13578E+11,AirAsia,0

Thanks
# 2  
Old 01-16-2014
Hi, that seems pretty straight forward.. What have you tried?
# 3  
Old 01-16-2014
i've tried this
Code:
cat fileinput | nawk '{FS=","; OFS=","; print $1,$2,$3,$4,sum[$5+$6+$7+$8+$9+$10+$11+$12+$13+$14+$15+$16+$17+$18+$19]}'

but it always zero on the fifth column
# 4  
Old 01-16-2014
Hi, FS needs to be set before the main part, also you need a loop to sum the fields. e.g.:
Code:
awk '{s=0; for(i=5; i<=NF; i++) s+=$i; print $1,$2,$3,$4,s}' FS=, OFS=, file

This User Gave Thanks to Scrutinizer For This Post:
radius
# 5  
Old 01-16-2014
big thanks

I still confuse about the statement s=0
Could you please explain more about your code
# 6  
Old 01-16-2014
Hi, s means "sum". The sum is set to zero before the field $5..$NF (last field) values are added by the for loop, for every line of the input file.
This User Gave Thanks to Scrutinizer For This Post:
radius
 
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