Sorry for not writing a detailed description of what i am working on. So i have thousands of files in a tab delimited format saved in one folder. Each file has a format of 2000 by 10 table What i want to do right now is create new file with the data i want. So the format of each file follows .. 
Gene exp1 exp2 exp3 exp4 ...
1    1050 2020 100  100
2    100  100  100  100
3    224  11   11   11
4    11   15   555  444
5    22   51   55   555
6    55   55   55   555
...

[download]
From the first file i read, I want to extract two columns for example I want 'Gene' and 'exp4' columns and put it in a new file. And from the rest of the other files, I want to extract 'exp4' column only and add on the right side of the two columns i extracted from the first file. So the final format would look like 
Gene file1 exp4 file2 exp4 file3 exp4 file4 exp4....
1       100         200      155         144
2        22         55       222         444
3
4
5
6
.
.

[download]
So it will have a 2000 by thousands(number of my files) table as a result. I am a beginner in programming and especially in perl. help me please..

In reply to Re^3: Is there any efficient way i can take out a specific column from hundreds of files and put it in one file? by coolda
in thread Is there any efficient way i can take out a specific column from hundreds of files and put it in one file? by coolda

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