awk to sum a column based on duplicate strings in another column and show split totals


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# 1  
awk to sum a column based on duplicate strings in another column and show split totals

Hi,
I have a similar input format-
Code:
A_1 2
B_0 4
A_1 1
B_2 5
A_4 1

and looking to print in this output format with headers. can you suggest in awk?awk because i am doing some pattern matching from parent file to print column 1 of my input using awk already.Thanks!
letter number_of_letters Total Split
Code:
A        3        4     2+1+1
B        2        10    4+5


Last edited by Franklin52; 01-10-2014 at 03:14 AM.. Reason: Please use code tags
# 2  
That would require something like this:

Code:
awk -F'[_ ]*' '
  {
    A[$1]++
    n=$2*$3
    if(n>B[$1]) B[$1]=n
    C[$1]=C[$1] (C[$1]==""?x:"+") $3
  } 
  END{
    for(i in A) print i, A[i], B[i], C[i]
  }
' OFS='\t' file

If not please specify more elaborately what it is that you need. Also, next time please show your attempts at a solution...
# 3  
Thank you.Can you pls tell me how to get rid of the _ field separator & count the duplicates in $1?
Say, for the input
Code:
A_1 2
B_0 4
A_1 1
B_0 5
A_1 1

and output should be
Code:
A_1       3        4     2+1+1 B_0       2        10    4+5


Last edited by Franklin52; 01-10-2014 at 10:10 AM.. Reason: fixed code tags
# 4  
How do you arrive at 10 for B_0 ?
# 5  
Sorry, typo.
It should read:
Code:
A        3        4     2+1+1
B        2        9    4+5

---------- Post updated at 09:28 AM ---------- Previous update was at 09:26 AM ----------

Oops.. this is the correct format required:
Code:
A_1        3        4     2+1+1
B_0        2        9    4+5


Last edited by Scrutinizer; 01-10-2014 at 01:21 PM.. Reason: moved [/code] tags
# 6  
Try:
Code:
awk '
  {
    A[$1]++
    B[$1]+=$2
    C[$1]=C[$1] (C[$1]==""?x:"+") $2
  } 
  END{
    for(i in A) print i, A[i], B[i], C[i]
  }
' OFS='\t' file

This User Gave Thanks to Scrutinizer For This Post:
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