Question

I have a file input as below:

-4.0,vijay
-2.0,chan
-3.0,vijay

and my command is :

 awk -F, '{a[$2]=a[$2]+$1}{for (i in a) print i","a[i]}'

i am expecting

vijay,-7.0
chan,-2.0

the actual output is

vijay -4
vijay -4
chan -2
vijay -7
chan -2

Answer 1

Try:

awk -F, '{arr[$2]+=$1}END{for(i in arr)print i,",",arr[i]}'