Awk to add selected row column data

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# 1  
Old 03-26-2012
Awk to add selected row column data

Looks at the most efficient way to add up the column of data based off of the rows.

Random data

So I would select all those who have ID = 15 and then add up total number
read - p "Enter ID number" Num

cut -d "-" -f 2-3 file.txt > temp.txt
awk -F "-" '/' $Num '/ {hour += $2} END {Print "Total is: " %.2f\n, number}' temp.txt

Not sure on the syntax or if hour+= should be $2 or $3Smilie
# 2  
Old 03-26-2012
awk -F '-'  '$3==15 {sum+=$2}  END{ print sum}'  randomfile

# 3  
Old 03-27-2012
Originally Posted by jim mcnamara
awk -F '-'  '$3==15 {sum+=$2}  END{ print sum}'  randomfile

cut -d ":" -f 2-3 works_on > temp.txt
awk -F ':'  '$3==$var3 {sum+=$2}  END{ print "Total : sum}' temp.txt

since 15 can change then it would have to be a variable. $3 is the 3rd column correct?

I get the error
"awk: line 1: runaway string constant"
# 4  
Old 03-27-2012
You can't have variable expansion inside single quotes. Try:

awk -F: '$3==v{sum+=$2} END{print "Total :" sum}' v="$var3" temp.txt

Your FS changed from "-" to ":" , correct?
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