Sponsored Content
Top Forums Shell Programming and Scripting Replace null values with dot using awk Post 302979653 by cmccabe on Wednesday 17th of August 2016 12:18:32 PM
Old 08-17-2016
Replace null values with dot using awk

Using awk I am trying to replace all blank or null values with a . in the tad delimited input. I hope the awk is close. Thank you Smilie.

input
Code:
name    test
sam      1

liz         2
al
             1

awk
Code:
awk 'BEGIN{FS=OFS="\t"}{for(i=1;++i<NF;)$i=$i?$i:"."}1'input
awk 'BEGIN { FS = OFS = "\t" } { for(i=1; i<=NF; i++) if($i ~ /^ *$/) $i = 0 }; 1' input

desired output
Code:
name    test
sam      1
.            .
liz         2
al          .
.            1

---------- Post updated at 11:18 AM ---------- Previous update was at 09:48 AM ----------

This awk seems to work:

Code:
awk -F"\t" '{ for (i=1;i<=NF;i++) { if ($i=="") { $i="." } } OFS="\t";print }' file

Thank you Smilie.

Last edited by cmccabe; 08-17-2016 at 12:36 PM.. Reason: added awk
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Find and replace a column that has '' to NULL in a comma delimited using awk or sed

Hi this is my first time posting ever. I'm relatively new in using AWK/SED, I've been trying many a solution. I'm trying to replace the 59th column in a file where if I encounter '' then I would like to replace it with the word NULL. example 0 , '' , '' , 0 , 195.538462 change it to 0... (5 Replies)
Discussion started by: gumal901
5 Replies

2. Shell Programming and Scripting

Awk script to replace null columns with blank

I have a file with contents "08011"||20080812 "23348"|20080827|20080924 "23387"|20080829|20080915 "23581"|20081003|20081028 "23748"|20081017|20090114 "24095"|20080919|20081013 "24105"|20070723|20070801 "24118"|20080806|20081013 "24165"|20080820|20080912 "24221"|20080908|20080929 i... (3 Replies)
Discussion started by: sonam273
3 Replies

3. Shell Programming and Scripting

How to replace quote symbol(") and dot(.) with some other values!!

Hi , I have below input file 1.order number is useful. 2.vendor_id is produced. 3.the vandor name is "malawar". I want output file like 1. order number is useful. 2. vendor_id is produced. 3. the vandor name is VmalawarV. in input file line number 1.order number there is no... (4 Replies)
Discussion started by: vinothsekark
4 Replies

4. Shell Programming and Scripting

Selective Replace awk column values

Hi, I have the following data: 2860377|"DATA1"|"DATA2"|"65343"|"DATA2"|"DATA4"|"11"|"DATA5"|"DATA6"|"65343"|"DATA7"|"0"|"8"|"1"|"NEGATIVE" 32340377|"DATA1"|"DATA2"|"65343"|"DATA2"|"DATA4"|"11"|"DATA5"|"DATA6"|"65343"|"DATA7"|"0"|"8"|"1"|"NEG-DID"... (3 Replies)
Discussion started by: sdohn
3 Replies

5. Shell Programming and Scripting

Replace a field where values are null in a file.

Hi, I've a pipe delimited file and wanted to replace the 3rd field to 099990 where the values are null. How can I achieve it using awk or sed. 20130516|00000061|02210|111554|03710|2|205069|SM APPL $80-100 RTL|S 20130516|00000061|02210|111554|03710|2|205069|SM APPL $80-100 RTL|S... (12 Replies)
Discussion started by: rudoraj
12 Replies

6. Shell Programming and Scripting

Handle null values-awk

I am using below code to validate the source file,code working fine but if any column contains null value then below code throwing error actually it should not.how to customize the below code to handle null null values also. When I run the script with below source data getting “date error”, as... (2 Replies)
Discussion started by: srivalli
2 Replies

7. Shell Programming and Scripting

Replace null values in csv with zero

Hi, i have another issue: i have three files: FILE 1 ServiceEventHandler, Processed,Percentage 5285337,100% FILE 2 Wallet, Processed,Percentage 5285337,100% (1 Reply)
Discussion started by: reignangel2003
1 Replies

8. Shell Programming and Scripting

Multiple columns replace with null values.

I am trying to replace the partcular columns(Col3,col5,col20,col44,col55,co56,col59,col60,col61,col62,col74,col75,col88,col90,col91,col93,col94,col95) with empty Input file Col1,col2,col3,col4,col5------,col100 1,2,3,4,5,---------,100 3,4,5,6,7,---------,300 Output : ... (3 Replies)
Discussion started by: onesuri
3 Replies

9. Shell Programming and Scripting

Printing null values in awk

Hi, I have a csv file with given details abc.txt 123,ra,point,,there 232,ba,points,home,pheer I want to get those values and store them in different variables: Code: while read line do echo $line |awk -F"," '{print $1" "$2" "$3" "$4" "$5"}'|read dbt_acct val_dt crncy AMT... (11 Replies)
Discussion started by: rahulsk
11 Replies

10. Shell Programming and Scripting

Count null values in a file using awk

I have the following a.txt file A|1|2|3|4|5| A||2|3|0|| A|1|6||8|10| A|9|2|3|4|1| A|0|9|3|4|5| A||2|3|4|5| A|0|av|.9|4|9| I use the following command to count null values for 2nd field awk -F"|" '!$2 { N++; next } END {print N}' a.txt It should give the result 2, but it is giving... (2 Replies)
Discussion started by: RJG
2 Replies
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). Free Software Foundation Nov 3 1999 IGAWK(1)
All times are GMT -4. The time now is 10:27 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy