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vigra::rf::visitors Namespace Reference

Visitors to extract information during training of RandomForest version 2. More...

Classes

class  CompleteOOBInfo
 
class  CorrelationVisitor
 
class  OnlineLearnVisitor
 
class  OOB_Error
 
class  OOB_PerTreeError
 
class  RandomForestProgressVisitor
 
class  StopVisiting
 
class  VariableImportanceVisitor
 
class  VisitorBase
 

Functions

template<class A>
detail::VisitorNode< A > create_visitor (A &a)
 
template<class A, class B>
detail::VisitorNode< A, detail::VisitorNode< B > > create_visitor (A &a, B &b)
 
template<class A, class B, class C>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C > > > create_visitor (A &a, B &b, C &c)
 
template<class A, class B, class C, class D>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D > > > > create_visitor (A &a, B &b, C &c, D &d)
 
template<class A, class B, class C, class D, class E>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E > > > > > create_visitor (A &a, B &b, C &c, D &d, E &e)
 
template<class A, class B, class C, class D, class E, class F>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F > > > > > > create_visitor (A &a, B &b, C &c, D &d, E &e, F &f)
 
template<class A, class B, class C, class D, class E, class F, class G>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F, detail::VisitorNode< G > > > > > > > create_visitor (A &a, B &b, C &c, D &d, E &e, F &f, G &g)
 
template<class A, class B, class C, class D, class E, class F, class G, class H>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F, detail::VisitorNode< G, detail::VisitorNode< H > > > > > > > > create_visitor (A &a, B &b, C &c, D &d, E &e, F &f, G &g, H &h)
 
template<class A, class B, class C, class D, class E, class F, class G, class H, class I>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F, detail::VisitorNode< G, detail::VisitorNode< H, detail::VisitorNode< I > > > > > > > > > create_visitor (A &a, B &b, C &c, D &d, E &e, F &f, G &g, H &h, I &i)
 
template<class A, class B, class C, class D, class E, class F, class G, class H, class I, class J>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F, detail::VisitorNode< G, detail::VisitorNode< H, detail::VisitorNode< I, detail::VisitorNode< J > > > > > > > > > > create_visitor (A &a, B &b, C &c, D &d, E &e, F &f, G &g, H &h, I &i, J &j)
 

Detailed Description

Visitors to extract information during training of RandomForest version 2.

This namespace contains all classes and methods related to extracting information during learning of the random forest. All Visitors share the same interface defined in visitors::VisitorBase. The member methods are invoked at certain points of the main code in the order they were supplied.

For the Random Forest the Visitor concept is implemented as a statically linked list (Using templates). Each Visitor object is encapsulated in a detail::VisitorNode object. The VisitorNode object calls the Next Visitor after one of its visit() methods have terminated.

To simplify usage create_visitor() factory methods are supplied. Use the create_visitor() method to supply visitor objects to the RandomForest::learn() method. It is possible to supply more than one visitor. They will then be invoked in serial order.

The calculated information are stored as public data members of the class. - see documentation of the individual visitors

While creating a new visitor the new class should therefore publicly inherit from this class (i.e.: see visitors::OOB_Error).

typedef xxx feature_t \\ replace xxx with whichever type
typedef yyy label_t \\ meme chose.
MultiArrayView<2, feature_t> f = get_some_features();
MultiArrayView<2, label_t> l = get_some_labels();
//calculate OOB Error
//calculate Variable Importance
double oob_error = rf.learn(f, l, visitors::create_visitor(oob_v, varimp_v);
//the data can be found in the attributes of oob_v and varimp_v now
Base class for, and view to, MultiArray.
Definition multi_array.hxx:705
Random forest version 2 (see also RandomForest for version 3)
Definition random_forest.hxx:148
Definition rf_visitors.hxx:865
Definition rf_visitors.hxx:1229
Visitors to extract information during training of RandomForest version 2.
Definition rf_visitors.hxx:96
detail::VisitorNode< A > create_visitor(A &a)
Definition rf_visitors.hxx:345

Function Documentation

◆ create_visitor() [1/10]

template<class A>
detail::VisitorNode< A > create_visitor ( A & a)

factory method to to be used with RandomForest::learn()

◆ create_visitor() [2/10]

template<class A, class B>
detail::VisitorNode< A, detail::VisitorNode< B > > create_visitor ( A & a,
B & b )

factory method to to be used with RandomForest::learn()

◆ create_visitor() [3/10]

template<class A, class B, class C>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C > > > create_visitor ( A & a,
B & b,
C & c )

factory method to to be used with RandomForest::learn()

◆ create_visitor() [4/10]

template<class A, class B, class C, class D>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D > > > > create_visitor ( A & a,
B & b,
C & c,
D & d )

factory method to to be used with RandomForest::learn()

◆ create_visitor() [5/10]

template<class A, class B, class C, class D, class E>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E > > > > > create_visitor ( A & a,
B & b,
C & c,
D & d,
E & e )

factory method to to be used with RandomForest::learn()

◆ create_visitor() [6/10]

template<class A, class B, class C, class D, class E, class F>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F > > > > > > create_visitor ( A & a,
B & b,
C & c,
D & d,
E & e,
F & f )

factory method to to be used with RandomForest::learn()

◆ create_visitor() [7/10]

template<class A, class B, class C, class D, class E, class F, class G>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F, detail::VisitorNode< G > > > > > > > create_visitor ( A & a,
B & b,
C & c,
D & d,
E & e,
F & f,
G & g )

factory method to to be used with RandomForest::learn()

◆ create_visitor() [8/10]

template<class A, class B, class C, class D, class E, class F, class G, class H>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F, detail::VisitorNode< G, detail::VisitorNode< H > > > > > > > > create_visitor ( A & a,
B & b,
C & c,
D & d,
E & e,
F & f,
G & g,
H & h )

factory method to to be used with RandomForest::learn()

◆ create_visitor() [9/10]

template<class A, class B, class C, class D, class E, class F, class G, class H, class I>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F, detail::VisitorNode< G, detail::VisitorNode< H, detail::VisitorNode< I > > > > > > > > > create_visitor ( A & a,
B & b,
C & c,
D & d,
E & e,
F & f,
G & g,
H & h,
I & i )

factory method to to be used with RandomForest::learn()

◆ create_visitor() [10/10]

template<class A, class B, class C, class D, class E, class F, class G, class H, class I, class J>
detail::VisitorNode< A, detail::VisitorNode< B, detail::VisitorNode< C, detail::VisitorNode< D, detail::VisitorNode< E, detail::VisitorNode< F, detail::VisitorNode< G, detail::VisitorNode< H, detail::VisitorNode< I, detail::VisitorNode< J > > > > > > > > > > create_visitor ( A & a,
B & b,
C & c,
D & d,
E & e,
F & f,
G & g,
H & h,
I & i,
J & j )

factory method to to be used with RandomForest::learn()

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de)
Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany

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vigra 1.12.2 (Mon Apr 14 2025)