ClusterImportanceVisitor Class Reference

#include <vigra/random_forest/rf_algorithm.hxx>

Inheritance diagram for ClusterImportanceVisitor:

Public Member Functions
template<class RF , class PR , class SM , class ST >
void	after_tree_ip_impl (RF &rf, PR &pr, SM &sm, ST &, int index)
template<class RF , class PR , class SM , class ST >
void	visit_after_tree (RF &rf, PR &pr, SM &sm, ST &st, int index)
template<class RF , class PR >
void	visit_at_beginning (RF const &rf, PR const &)
template<class RF , class PR >
void	visit_at_end (RF &rf, PR &)
Public Member Functions inherited from VisitorBase
double	return_val ()
template<class Tree , class Split , class Region , class Feature_t , class Label_t >
void	visit_after_split (Tree &tree, Split &split, Region &parent, Region &leftChild, Region &rightChild, Feature_t &features, Label_t &labels)
template<class RF , class PR , class SM , class ST >
void	visit_after_tree (RF &rf, PR &pr, SM &sm, ST &st, int index)
template<class RF , class PR >
void	visit_at_beginning (RF const &rf, PR const &pr)
template<class RF , class PR >
void	visit_at_end (RF const &rf, PR const &pr)
template<class TR , class IntT , class TopT , class Feat >
void	visit_external_node (TR &tr, IntT index, TopT node_t, Feat &features)
template<class TR , class IntT , class TopT , class Feat >
void	visit_internal_node (TR &, IntT, TopT, Feat &)

Public Attributes
MultiArray< 2, double >	cluster_importance_
MultiArray< 2, double >	cluster_stdev_
MultiArray< 2, int >	variables

Detailed Description

calculate Cluster based permutation importance while learning. (RandomForestVisitor)

Member Function Documentation

void visit_at_beginning	(	RF const &	rf,
		PR const &
	)

Allocate enough memory

void after_tree_ip_impl	(	RF &	rf,
		PR &	pr,
		SM &	sm,
		ST &	,
		int	index
	)

compute permutation based var imp. (Only an Array of size oob_sample_count x 1 is created.

• apposed to oob_sample_count x feature_count in the other method.

See Also

FieldProxy

void visit_after_tree	(	RF &	rf,
		PR &	pr,
		SM &	sm,
		ST &	st,
		int	index
	)

calculate permutation based impurity after every tree has been learned default behaviour is that this happens out of place. If you have very big data sets and want to avoid copying of data set the in_place_ flag to true.

void visit_at_end	(	RF &	rf,
		PR &
	)

Normalise variable importance after the number of trees is known.

Member Data Documentation

MultiArray<2, int> variables

List of variables as produced by GetClusterVariables

MultiArray<2, double> cluster_importance_

Corresponding importance measures

MultiArray<2, double> cluster_stdev_

Corresponding error

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The documentation for this class was generated from the following file:

• vigra/random_forest/rf_algorithm.hxx