AWK create loop for fields


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# 1  
PHP AWK create loop for fields

Hi everybody:
I just create awk script. This script calculate the average of a field, but i want to do it for every fields.
The original field has 40 fields of numbers like that:

38.00 51.00 10.00 -99.90 75.00 47.00 4.00 -99.90 69.00 121.00 62.00 6.00 70.00 43.00 36.00 49.00 8.00 36.00 50.00 74.00 125.00 41.00 70.00 39.00 24.00 33.00 53.00 -99.90 70.00 2.00 24.00 71.00 28.00 122.00 31.00 -99.90 40.00 39.00 28.00 94.00 06/26/2005 00:10 (this is only one row, this is field $0)

and the script is:

BEGIN{ FS=" "; sum=0; iFinal=6;}
{
(*)
{
if (NR<=iFinal)
{
sum=sum + $1;
if (NR==iFinal)
{
average=sum/6;
printf "%.4s\n", average;
}
}
else
{
iFinal=NR +5;
sum= $1;
}
}
}

I tried to do this with "for" like this:

for (j=1; j<=40; j++) # put it on (*)

But do not function correctly. Could anybody help how do it?.
Thanks in advance. Smilie
tonet
# 2  
don't quite understand your code, but....
if you want to calculate the average for every field accross all the records/lines, here's some thing to start with. Notice the last two fields on every line are not considered AND also it's assumed that ALL the records/lines have the same number of fields.

Code:
{
  for(i=1; i < NF-2; i++)
    arr[i] += $i

  _nf=i
}
END {
  for(i=1; i<=_nf; i++)
    printf("%.2f%s", arr[i]/NR, (i!=_nf) ? OFS : "\n")
}

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