Just a guess, are the columns fixed width? If so, unpack can help.

while (<DATA>) {
    chomp;
    my @fields = unpack('a7 a7 a7');
    print join(" ", map {"\"$_\""} @fields), "\n";
}
__DATA__
 15,567-25,324-45,234 
-13,345 53,562 13,452 
 -7,521-22,454-54,671

[download]

Outputs:

" 15,567" "-25,324" "-45,234"
"-13,345" " 53,562" " 13,452"
" -7,521" "-22,454" "-54,671"

[download]

In reply to Re: problem with splitting file on whitespace: how to circumvent inconsistent formatting through file by Anonymous Monk
in thread problem with splitting file on whitespace: how to circumvent inconsistent formatting through file by angela2

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.