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Ingy döt Net 2013-10-27 22:24:23 +00:00
parent 6f050a029e
commit 776bba907c
3887 changed files with 59894 additions and 7280 deletions
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6
Task/Entropy/Perl/entropy.pl
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@ -1,8 +1,10 @@
sub entropy {
my %count; $count{$_}++ for @_;
my @p = map $_/@_, values %count;
my $entropy = 0;
$entropy += - $_ * log $_ for @p;
for (values %count) {
my $p = $_/@_;
$entropy -= $p * log $p;
}
$entropy / log 2
}