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Top Forums Shell Programming and Scripting Using awk to place decimal points at proper position Post 302967505 by Prathmesh on Wednesday 24th of February 2016 09:35:25 AM
Old 02-24-2016
Using awk to place decimal points at proper position

Hi,

I have one input file which is delimited by pipe. I want to put decimal points in this input file at particular position in particular column and also get the negative sign (if any) at start of that column.

Code:
$ cat Input_file.txt
11|10102693|1|20151202|10263204|20151127|N|0001
11|20100142-|2|20151202|21411783-|20151127|3|0005

And, There is one comma separated file which mentions "Column number","length of the column" and "position of decimal point".

Code:
$ cat decimal.csv
2,8,3
5,8,4

Expected output is as follows:
Code:
11|101.02693|1|20151202|1026.3204|20151127|N|0001
11|-201.00142|2|20151202|-2141.1783|20151127|3|0005

I have tried below awk code but, I am not getting expected output:
Code:
$ awk 'FNR == NR {A[NR]=$1;B[NR]=$2;C[NR]=$3;CNT=NR;next}{for(i=1;i<=CNT;i++) $A[i]=substr($A[i],$B[i]+1,1) substr($A[i],1,$C[i]) "." substr($A[i],$C[i]+1,$B[i]-$C[i])} {print $0}' FS="," decimal.csv FS="|" OFS="|" Input_file.txt
11|01.|1|20151202|010263204.|20151127|N|0001
11|120.100|2|20151202|721411783-.|20151127|3|0005

Can someone please help me to figure out what I am doing wrong here and correct me.
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgawk | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for gawk is available on http://opensolaris.org. Free Software Foundation Nov 3 1999 IGAWK(1)
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