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OK sir !! thanks very much i will have a look and I will keep you informed

---------- Post updated at 04:04 PM ---------- Previous update was at 11:04 AM ----------

the TreeSoft software is...

Hi ctsgnb !
1) This is the big problem I have ! when you make a threshold condition (80% as an example) the algorithm split one group into multiple group ! because all the associations (as shown in...

Exactly A B C D E F G are a group ! and the group should be defined in one line .
Thanks sir

I'm sorry I think that sometimes I'm not very clear !
What I want is to group together chromosome sequences that are very closed basing on the identity sequence. The number of lines will depend of...

OK sir ctsgnb ! The input is (just the beginning because the original file contain more than 100,000 lines ! ):

chromosome07_194379 chromosome01_168057 0.975
chromosome01_100293 ...

you are right sir I dont !! the output is not good unfortunately : chromosome01_100293 chromosome01_168057 chromosome07_194379
chromosome01_29385 chromosome01_168057 chromosome07_194379...

Thanks a lot it works !! but when i use the code for my initial file that i post in the first message it don't work ): ! I never use before the awk code i must learn it. It is possible to just change...

This is your code :
awk 'NR>1&&$3>=80{A[$1]=$1;B[A[$1]]=(B[A[$1]]?B[A[$1]]:$1)" "$2}END{for(i in A) print B[A[i]]}' test.tttt
And this is the output :
A D E
B C
D E
--> The DE is not a single...

Thanks to take time re reply me I am very grateful.
Now it's seem better ! but the third line DE I have to ignore it because my original file is very very big ! I will have repeated information in...

Thanks ctsgnb I try your code and the output is like that :
A C D E
B C D E
C D E
D E

hi ctsgnb and zaxxon thanks a lot for replying. what i need is group the id basing in the identity sequence for exemple :
ID1 ID2 Identity
A B 70
A C 50
A D 90
A E ...

Hello every body ! I'm a new in this forum and beginner in Perl scripting and I have some problems :(:(:(! I have a big file like that :

ID1 ID2 Identity ...