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Help to print the line that share exactly same with column one content

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# 1  
Old 02-13-2014
Help to print the line that share exactly same with column one content
Input file :
Code:
AAAG TC
AACCCT AACCCT AACCCT AACCCT
TCTG TCTG TCTG AC AC TCTG TCTG AC AC AC
AC AC
AGTG AC
AGTG TCC

Desired output file :
Code:
AACCCT AACCCT AACCCT AACCCT
AC AC

I would like to print out the line that share exactly same as the first column data content.
Column one data is treated as the reference record while comparing with other column content.

Thanks for any advice.
# 2  
Old 02-13-2014
Try something like:
Code:
awk '{for(i=2; i<=NF; i++) if($i!=$1) next}1' file

Note that this would also match lines that have only one field, which may or may not be what you want..
This User Gave Thanks to Scrutinizer For This Post:
perl_beginner
# 3  
Old 02-13-2014
Hi Scrutinizer,

I just have some question need your advice :
Input file:
Code:
AAAG TC
AACCCT AACCCT AACCCT AACCCT
TCTG TCTG TCTG AC AC TCTG TCTG AC AC AC
AC AC
AC AC
AT AT
AGTG AC
AGTG TCC
ATCT ATCT ATCT ATCT ATCT
AC AC

Command 1
Code:
awk '{for(i=2; i<=NF; i++) if($i!=$1) next}1' file
AACCCT AACCCT AACCCT AACCCT
AC AC
AC AC
AT AT
ATCT ATCT ATCT ATCT ATCT
AC AC

Command 2
Code:
awk '{for(i=2; i<=NF; i++) if($i==$1) next}1' file
AAAG TC
AGTG AC
AGTG TCC

From command 2, I just edit "!=" into "==" based on your command 1.
I just curious why command 2 won't print out "TCTG TCTG TCTG AC AC TCTG TCTG AC AC AC".

Thanks for any advice.
Last edited by Scrutinizer; 02-14-2014 at 03:44 AM.. Reason: changed - to =
# 4  
Old 02-13-2014
Lets look at the pseudo code for your 2 commands it might help you see what has happened:

1:Don't print if any field is different to field#1

2:Don't print if any field is the same as field#1
This User Gave Thanks to Chubler_XL For This Post:
perl_beginner
# 5  
Old 02-13-2014
Hi,

I guess I understand the reason right now.
Many thanks Smilie
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