求和

zhaopingzi

txt1:
a  3
b  4

txt2:
a 3
c 2
b 3


求结果
a 3
b 7
c 2

haooooaaa

1. awk '{a[$1]+=$2}END{for(i in a)print i, a[i]}' a b

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zhaopingzi

   

chengchow

1. [root@ads52 tmp]# cat txt1
   
2. a 3
   
3. b 4
   
4. [root@ads52 tmp]# cat txt2
   
5. a 3
   
6. c 2
   
7. b 3
   
8. [root@ads52 tmp]# awk 'a[$0]==0{a[$0]=$2;b[$1]+=$2}END{for(i in b){print i,b[i]}}' txt1 txt2
   
9. a 3
   
10. b 7
    
11. c 2
    

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cjaizss

我猜:

1. 
   
2. awk 'NF!=2{next}f[$1,$2]{next}{a[$1]+=$2;f[$1,$2]=1;}END{for(i in a)print i,a[i]}' urf1 urf2 ..
   

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