Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
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 ...
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 . .
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

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others examining the Monastery: (5)
    As of 2021-04-13 13:02 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      No recent polls found

      Notices?