I have a file that looks like this 
item1 item2 item3  
0  0    1  S    0  0   
0  0    2  K    0  0   
0  0   23  T    1  M
12 T   24  N    2  L 
45 0   36  V   14  I 
46 0   38  W   16  R 
51 S   39  A   17  L
52 A   42  N   20  E
53 0   43  L   21  G

[download]
So, for each item, there are two columns of data. My question is, how might I go about writing new files that only contain the two columns for that particular item (and name each file item1.dat, item2.dat etc.) So, for example, item1.dat should look like this: 
0  0     
0  0   
0  0   
12 T   
45 0   
46 0   
51 S   
52 A   
53 0

[download]
The actual original file is a fair bit larger than this and has more items. All of these items need to have their own files containing their two items of data. Any advice as to how to get started etc appreciated.

In reply to creating smaller files from one large one by Angharad

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, details, 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, summary, 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.