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# 1  
Old 08-17-2009
Need Regular expression


I want to find the records using grep with following conditions.

one field position at 26 and having length 2 and values of 21,24,31,34 or
another field position at 28 and length 2 of values 21,224,31,34

I wrote it like below, But I want this search using grep, can any one provide?
awk 'substr($0,26,2)==21 || substr($0,26,2)==24 || substr($0,26,2)==31 || substr($0,26,2)==34 || substr($0,28,2)==21 ||substr($0,28,2)==24||substr($0,28,2)==31 ||substr($0,28,2)==24{print $0}' R3AP200811_GMSSMSTRLD_01358_20081119235959.traf_load


Last edited by Franklin52; 08-17-2009 at 07:08 AM.. Reason: Please use code tags!
# 2  
Old 08-17-2009
i'm not sure to understand why you say toy use grep, if i understandign you i think you need cut:
while read line 
var=`echo $line |cut -c26,27 `
var2=`echo $line|cut -c28,29 `

if [ $var -eq $NUMBER1 -o $ var2 -eq $NUMBER1 ..................................... ]
done< file

Last edited by chipcmc; 08-17-2009 at 07:56 AM..
# 3  
Old 08-17-2009
grep -E '^.{25}(21|24|31|34)(21|24|31|34)' file

# 4  
Old 08-17-2009
Originally Posted by danmero
grep -E '^.{25}(21|24|31|34)(21|24|31|34)' file

This way you ignore OR. With your code both fileds (26-27) AND (28-29) have to be true. If I understud it good, itīs enought that one condition is satisfied.

grep -E "^.{25}((21|24|31|34)..|..(21|24|31|34))" file

Last edited by necroman08; 08-17-2009 at 09:14 AM.. Reason: Adding quote
# 5  
Old 08-17-2009
Or, a shorter version that takes advantage of the cross product:

grep -E "^.{25}([23][14]..|..[23][14])" file


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