Please excuse my ignorance, but I'm not sure where to call the subroutine build histogram, and how to print out the returned result hash. I think I'm going about this in the wrong way. I tried this: 
open(READMAP, "$command  |") || error_exit("Cannot run readmap, $!"); 
+#run the readmap command
while(<READMAP>) {    #loop through the output of the readmap command
        if (/StageTime/){
        @fields = split/\s+/;                                         
+  #Split the output by white space
        chop $fields[9];                                              
+  # Remove the period after the last digit
        $diskxStats[$i]{'filesize'}=$fields[2];
        $diskxStats[$i]{'ftptime'}=$fields[5];
        $diskxStats[$i]{'stagetime'}=$fields[9];
        if ( $fields[5] != 0 ){
        $diskxStats[$i]{'transferRate'} = $fields[2] / $fields[5];
        }
        else{
        $diskxStats[$i]{'transferRate'} = $fields[2];
        }
        if ( $fields[9] != 0 ){
        $diskxStats[$i]{'stagerate'} = $fields[2] / $fields[9];
        }
        else{
        $diskxStats[$i]{'stagerate'} = $fields[2];
        }
        $i++;
        }
}



for $i (0 .. $#diskxStats ) {
        build_histogram ($bin_stage, $diskxStats[$i]{'stagetime'});
        }

sub build_histogram {
   my ($bucket_size, @items) = @_;
   my %result;
   for (@items) {
       my $bucket = $bucket_size * floor($_ / $bucket_size);
  #     print "$bucket\n";
       $result{$bucket}++;
   }
   return %result;
}

[download]
Which is obviously incorrect, but not sure what I need to change to get the results you got?

In reply to Re^4: Working out frequency statistics with perl by wishartz
in thread Working out frequency statistics with perl by wishartz

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.