1Instance(3)           User Contributed Perl Documentation          Instance(3)
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NAME

6       AI::DecisionTree::Instance - C-struct wrapper for training instances
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SYNOPSIS

9         use AI::DecisionTree::Instance;
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11         my $i = new AI::DecisionTree::Instance([3,5], 7, 'this_instance');
12         $i->value_int(0) == 3;
13         $i->value_int(1) == 5;
14         $i->result_int == 7;
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DESCRIPTION

17       This class is just a simple Perl wrapper around a C struct embodying a
18       single training instance.  Its purpose is to reduce memory usage.  In a
19       "typical" training set with about 1000 instances, memory usage can be
20       reduced by about a factor of 5 (from 43.7M to 8.2M in my test program).
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22       A fairly tight loop is also implemented that helps speed up the
23       "train()" AI::DecisionTree method by about a constant factor of 4.
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25       Please do not consider this interface stable - I change it whenever I
26       have a new need in AI::DecisionTree.
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AUTHOR

29       Ken Williams, ken@mathforum.org
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SEE ALSO

32       AI::DecisionTree
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36perl v5.28.0                      2012-03-03                       Instance(3)