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AWK (presumably) subtotalling question

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# 1  
Old 02-04-2010
AWK (presumably) subtotalling question
Hi,
I'm guessing I can achieve this with awk, but maybe not, maybe I need more. Basically I have some data of the form:
Code:
System1
  a=4
  b=3
  c=2
System2
  a=1
  b=3
System3
  a=2
  c=1
  d=3

What I want out is simply the subtotal (a+b+c+d) for each system:

Code:
System1 9
System2 4
System3 6

etc

Any ideas on the easiest way of calculating this? There are a few hundred Systems, and each can contain between 1 and 9 sub values.

Many thanks Smilie
# 2  
Old 02-04-2010
Code:
nawk -F"=" '/System/{sys=$1 ; a[sys]=0 ;}{a[sys]+=$2}
END{for (i in a) print i,a[i]}' infile.txt

SmilieSmilieSmilie

---------- Post updated at 18:34 ---------- Previous update was at 18:11 ----------

to guaranty the o/p order use the below perl code which will give you the same result and will guaranty the output order.

Code:
perl -wnlaF'='  -e '
/System/ and $sys=$F[0] ;
! /System/ and $a{$sys}+=$F[1] ;
END {
foreach $k (sort keys %a) { print "$k  $a{$k}" ; } ;
}'  infile.txt

SmilieSmilieSmilie
# 3  
Old 02-04-2010
First (n)awk based solution seems to work perfectly, thank you very much!

The data isn't actually ordered as I want it anyway, so can sort based on my own requirements.

Thanks Smilie
# 4  
Old 02-04-2010
You can keep the order with awk with this approach:
Code:
awk -F= '/System/{if(s){print s;s=0} printf("%s ",$0)} {s+=$2}
END{print s}' file

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