Conditional aggregation and print of a column in file


 
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# 1  
Old 11-17-2009
Question Conditional aggregation and print of a column in file

Hi
My input file looks like
Code:
field1 field2 field3 field4 field5
field1 field2 field3 field4 field5
field1 field2 field3 field4 field5
::::::::::::
::::::::::::

There may be one space of multiple spaces between fields and no fields contains spaces in them.

If field 1 to 4 are equal for consecutive rows sum field 5 and continue this until any field is different.If any field in different, print field 1 to 4 and the sum.

I tried with following code and working perfectly:

Bu for input file of 70000 lines it takes 5 mins.
Can this be improved?? Please help

Code:
      first_rec=1
      while read line
      do
         if [[ $first_rec -eq 1 ]]
         then
            field1=`echo $line|tr -s " "|cut -d" " -f1`
            field2=`echo $line|tr -s " "|cut -d" " -f2`
            field3=`echo $line|tr -s " "|cut -d" " -f3`
            field4=`echo $line|tr -s " "|cut -d" " -f4`
            field5=0
            first_rec=0
         fi
         new_field1=`echo $line|tr -s " "|cut -d" " -f1`
         new_field2=`echo $line|tr -s " "|cut -d" " -f2`
         new_field3=`echo $line|tr -s " "|cut -d" " -f3`
         new_field4=`echo $line|tr -s " "|cut -d" " -f4`
         new_field5=`echo $line|tr -s " "|cut -d" " -f5`
         if [ fields 1 -4 are same ]
         then
            field5=`echo $field5 + $new_field5|bc` #Float field
         else
            echo "$field1$field2$field3$field4$field5" >> output file
            field5=$new_field5
         fi
         field1=$new_field1
         field2=$new_field2
         field3=$new_field3
         field4=$new_field4
      done < Input_file
      # for last record
      echo "$field1$field2$field3$field4$field5" >> output file

# 2  
Old 11-17-2009
Try:

Code:
awk '{ str=$1" "$2" "$3" "$4; if (arr[str]== "") arr[str]=$5; else arr[str]+=$5; } END { for (x in arr) print x" "arr[x]; }' file

input:
Quote:
12 123 213 213 342
12 123 13 213 342
12 23 213 213 342
12 123 213 213 342
12 123 213 213 342
12 23 213 213 342
12 23 213 213 342
output:
Quote:
12 23 213 213 1026
12 123 13 213 342
12 123 213 213 1026
# 3  
Old 11-17-2009
Hi dennis

Brilliant command..
Suppose if the input is fixed length like
Code:
field1<1 space>field2<3 spaces>field3<5spaces>field4<10 spaces>field5

where spaces can vary..
I need output in same format as input just the field 5 will change value.
I need output in format printf "%-20s%-10s%-10s%-10s%10s"

Please help
# 4  
Old 11-17-2009
Quote:
Originally Posted by bittoo
Hi dennis

Brilliant command..
Suppose if the input is fixed length like
Code:
field1<1 space>field2<3 spaces>field3<5spaces>field4<10 spaces>field5

where spaces can vary..
I need output in same format as input just the field 5 will change value.
I need output in format printf "%-20s%-10s%-10s%-10s%10s"

Please help
try this. But am concerned about the speed of execution now...

Code:
awk '{ str=$1" "$2" "$3" "$4; if (arr[str]== "") arr[str]=$5; else arr[str]+=$5; } END { for (x in arr) { str=x" "arr[x]"\n"; split(str,a," ");printf "%-20s%-10s%-10s%-10s%10s\n", a[1],a[2],a[3],a[4],a[5]; }}'  file

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