search for a string , and add if it matches
- by Sharat Chandra
I have a file that has 2 columns as given below....
101 6
102 23
103 45
109 36
101 42
108 21
102 24
109 67
and so on......
I want to write a script that adds the values from 2nd column if their corresponding first column matches
for example add all 2nd column values if it's 1st column is 101
add all 2nd column values if it's 1st colummn is 102
add all 2nd column values if it's 1st colummn is 103 and so on ...
i wrote my script like this , but i'm not getting the correct result
awk '{print $1}' data.txt > col1.txt
while read line
do
awk ' if [$1 == $line] sum+=$2; END {print "Sum for time stamp", $line"=", sum}; sum=0' data.txt
done < col1.txt
