The following code (or some derivation of it) should be what you want. Basically it goes through the hash once and builds an array-of-arrays to store the indexes of the files, broken down by duration. Then just iterates through that array to print out the results. : 
#!/usr/bin/perl -w

use strict;

# maximal $ of minutes
my $max_bucket=5;

my %file;

$file{1}{TITLE}='foo';
$file{1}{SIZE}='5';
$file{1}{VLENGTH}='0 days 0 hours 4 mins 5 secs';
$file{2}{TITLE}='bar';
$file{2}{SIZE}='92';
$file{2}{VLENGTH}='0 days 0 hours 4 mins 13 secs';
$file{3}{TITLE}='baz';
$file{3}{SIZE}='1';
$file{3}{VLENGTH}='0 days 0 hours 2 mins 23 secs';

# initialize stats array
my @stat;
for(my $c=0;$c<=$max_bucket;$c++){
  $stat[$c]=[];
}

# populate stats array
my $k;
foreach $k(keys %file){
  my ($d,$h,$m)=$file{$k}{VLENGTH}=~/(\d+)\s*days\s*(\d+)\s*hours\s*(\
+d+)\s*mins/i;
  my $duration=$m+$h*60+$d*60*24;
  $duration=$max_bucket if($duration>$max_bucket);
  push @{$stat[$duration]},$k;
}

# iterate through stats array to print out counts
for (my $c=0;$c<=$max_bucket;$c++){
  print "there are ".(scalar @{$stat[$c]})." clips "; 
  if($c==$max_bucket){
    print "greater than $c mins :\n"; 
  }else{
    print "between $c and ".($c+1)." mins :\n"; 
  }
}

# iterate through stats array to print out names
for (my $c=0;$c<=$max_bucket;$c++){
  print "Names of clips "; 
  if($c==$max_bucket){
    print "greater than $c mins : "; 
  }else{
    print "between $c and ".($c+1)." mins : "; 
  }
  print "".(join ', ',map {$file{$_}{TITLE}} @{$stat[$c]})."\n"; 
}

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In reply to Re: Numeric summarisation from data in a hash? by lhoward
in thread Numeric summarisation from data in a hash? by dmtelf

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