Randal's already answered this, so you probably aren't reading further, but here's my go 
my $sum = 100;
my $elements = 30;

my @array;
for (1..$sum) { 
  ++$array[ int rand $elements ];
}

$array[$_] ||= 0 for @array;

[download]
so you can fiddle with the sum, and the number of elements you want at your leisure.

Jasper

In reply to Re: Randomly generating histograms by Jasper
in thread Randomly generating histograms by narse

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