Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to check if a column is having a numeric value or not in a file?
Top Forums Shell Programming and Scripting How to check if a column is having a numeric value or not in a file? Post 302408399 by kshji on Monday 29th of March 2010 11:22:00 AM
Old 03-29-2010
Code:
#!/bin/ksh or bash or dash or ...
cat <<EOF > $0.txt
ASDF,QWER,GHJK,123,FGHY,9876
GHTY,NVHR,WOPI,623,HFBS,5386
GHTY,NVHR,WOPI,A623,HFBS,5386
EOF

num()
{
   val="$1"
   # replace numbers with nothing, rest chars are something else
   otherchars="${val//[0-9]/}"
   [ "$otherchars" != "" ] && return 1 # not num
   return 0 # it's num
}
############################

oifs="$IFS"
cat $0.txt | while read line
do
        IFS=","
        flds=($line)
        IFS="$oifs"
        f4=${flds[3]}
        f6=${flds[5]}
        num "$f4" || echo "not num $f4"
        num "$f6" || echo "not num $f6"
done

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to check a column contain numeric or char data type ??

I have a file called clientname_filename.csv whose contents are like col1|col2|col3|col4| 510|abc|xxx|450| 510|abc11|yyy|350 510|pqr99|zzz| 670 512|222|439|110 Here i have check the contents of column for data type. i have a constraints that col1 always contain Numeric value column 2... (12 Replies)
Discussion started by: jambesh
12 Replies

2. Shell Programming and Scripting

to check variable if its non numeric

if test $b -ne then echo "\n\n\n\tPassword reset has been done successfully" else echo "\n\n\n\tAn error occurred" fi i want to check whether $b is non-numeric so how to do that? (3 Replies)
Discussion started by: sachin.gangadha
3 Replies

3. Shell Programming and Scripting

How to check Null values in a file column by column if columns are Not NULLs

Hi All, I have a table with 10 columns. Some columns(2nd,4th,5th,7th,8th and 10th) are Not Null columns. I'll get a tab-delimited file and want to check col by col and generate seperate error code for each col eg:102 if 2nd col value is NULL and 104 if 4th col value is NULL so on... I am a... (7 Replies)
Discussion started by: Mandab
7 Replies

4. Shell Programming and Scripting

check whether it is a non-numeric character

Below is the abstract of the script which is working fine. if ] then error_process "Invalid month format." return 1 fi I am doing validation for month and it errors if the value is > 12 or < 0. In addition, I want to add another condition to error if it... (2 Replies)
Discussion started by: sony_dada
2 Replies

5. Programming

check the given string is numeric or not.

Hi, how to check the given string is numeric or not , without converting ( using strtol...). for ex: if string is C01 - non-numeric data if string is 001 - numeric data TIA (11 Replies)
Discussion started by: knowledge_gain
11 Replies

6. Shell Programming and Scripting

How to check if the file contains only numeric values

How to check if the file contains only numeric values. I don't want to read entire file it eats lot of cpu Or any way which consumes less memory n cpu.. Please suggest -S (2 Replies)
Discussion started by: sunilmenhdiratt
2 Replies

7. Shell Programming and Scripting

How to check for a Numeric Value?

Using shell, I have a variable, how can I check that variable for a numeric value such as "41.0"? My program needs to do one things if the numeric value is found, and another if something else such as a string of letter is found. is there a specific character that denotes a numeral? The... (2 Replies)
Discussion started by: chagan02
2 Replies

8. Shell Programming and Scripting

check if a string is numeric

I checked all the previous threads related to this and tried this. My input is all numbers or decimals greater than zero everytime. I want to check the same in the korn shell script. Just validate the string to be numeric. This is what I am doing. var="12345" if ) -o "$var" !=... (14 Replies)
Discussion started by: megha2525
14 Replies

9. Shell Programming and Scripting

Sorting file based on a numeric column

Hi, I use UBUNTU 12.04. I have a file with this structure: Name 2 1245787 A G 12 14 12 14 .... Name 1 1245789 C T 13 12 12 12..... I would like to sort my file based on the second column so to have this output for example: Name 1 1245789 C T 13 12 12 12..... Name 2 1245787 A G 12 14... (4 Replies)
Discussion started by: Homa
4 Replies

10. Shell Programming and Scripting

Check whether input is numeric

Hello there, find below for my code first: $pdp_asaba=`cat /tmp/temp_total | grep asaba | sed 's/*//g'` if ]] then pdp_asaba=0 fi $pdp_abuja=`cat /tmp/temp_total | grep abuja | sed 's/*//g'` if ]] then pdp_abuja=0 fi $pdp_ojota=`cat /tmp/temp_total | grep ojota | sed 's/*//g'` if ... (3 Replies)
Discussion started by: infinitydon
3 Replies

LEARN ABOUT SUNOS

getusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

       /bin/bash		  /bin/csh
       /bin/jsh 		  /bin/ksh
       /bin/pfcsh		  /bin/pfksh
       /bin/pfsh		  /bin/sh
       /bin/tcsh		  /bin/zsh
       /sbin/jsh		  /sbin/pfsh
       /sbin/sh 		  /usr/bin/bash
       /usr/bin/csh		  /usr/bin/jsh
       /usr/bin/ksh		  /usr/bin/pfcsh
       /usr/bin/pfksh		  /usr/bin/pfsh
       /usr/bin/sh		  /usr/bin/tcsh
       /usr/bin/zsh		  /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

SunOS 5.10							    30 Aug 2004 						  getusershell(3C)
All times are GMT -4. The time now is 02:16 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy