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Printing lines with specific strings at specific columns

 
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# 1  
Old 09-04-2013
Printing lines with specific strings at specific columns
Hi
I have a file which is tab-delimited. Now, I'd like to print the lines which have "chr6" string in both first and second columns. Could anybody help?
# 2  
Old 09-04-2013
The ~/RE/ searches for "chr6" being a substring:
Code:
awk '$1~/chr6/ && $2~/chr6/' file

The exact string match:
Code:
awk '$1=="chr6" && "$2=="chr6"' file

This User Gave Thanks to MadeInGermany For This Post:
a_bahreini
# 3  
Old 09-05-2013
The same in "grep" (replace "<tab>" with literal tab characters why typing):

exact match:

Code:
grep '^chr6<tab>chr6<tab>' /path/to/file

substring match:

Code:
grep '^[^<tab>]*chr6[^<tab>]*<tab>[^<tab>]*chr6[^<tab>]*<tab>' /path/to/file

I hope this helps.

bakunin
# 4  
Old 09-05-2013
Quote:
Originally Posted by MadeInGermany
The ~/RE/ searches for "chr6" being a substring:
Code:
awk '$1~/chr6/ && $2~/chr6/' file

The exact string match:
Code:
awk '$1=="chr6" && "$2=="chr6"' file

It's better to set the input field separator to a tab character, to take care of the cases wherein the fields have spaces as part of data.
 
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