Something like the following might work. Note that printing a line for each day of the specified month can be difficult when the month is February and you have to figure out whether the year is a leap year or not. Also note that the data is tab delimited, and may or may not come through a cut and paste correctly. 
use strict;
use warnings;

my ($keya, $keyb, %hash);

while (<DATA>) {
    chomp; my @d = split(/[\/\t]/);
    $keya = $d[2].$d[0]; $keyb = $d[1];
    if (exists($hash{$keya}{$keyb})) {
        push(@{$hash{$keya}{$keyb}}, \@d);
    }
    else {
        $hash{$keya}{$keyb} = [\@d];
    }
}

my $year = 2003;
my $month = 2;
my @days = (31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
if (($year % 4) && ($year % 100)) { $days[1] = 29; }

for (1..($days[$month-1])) {
    print sprintf('%02d/%02d', $month, $_)."/$year\n";
    for (@{$hash{"$year$month"}{$_}}) {
        print '   '.@$_[3].' '.@$_[4]."\n";
    } print "\n";
}

__DATA__
1/2/2003    Sample1    Site1
1/2/2003    Sample2    Site2
2/3/2003    Sample2    Site2
2/3/2003    Sample2    Site1
2/3/2003    Sample3    Site1
2/13/2003    SAmple2    Site4
1/5/2003    Sample1    SITE2

[download]

In reply to Re: Data interpretation by TedPride
in thread Data interpretation by rupesh

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.