#include <clsfy_null_builder.h>

Inheritance diagram for clsfy_null_builder:

Public Member Functions
	clsfy_null_builder ()
virtual clsfy_classifier_base *	new_classifier () const
	Create empty model.
virtual double	build (clsfy_classifier_base &model, mbl_data_wrapper< vnl_vector< double > > &inputs, unsigned nClasses, const vcl_vector< unsigned > &outputs) const
	Build classifier from data.
virtual vcl_string	is_a () const
	Name of the class.
virtual bool	is_class (vcl_string const &s) const
	Name of the class.
short	version_no () const
	IO Version number.
virtual clsfy_builder_base *	clone () const
	Create a copy on the heap and return base class pointer.
virtual void	print_summary (vcl_ostream &os) const
	Print class to os.
virtual void	b_write (vsl_b_ostream &bfs) const
	Save class to binary file stream.
virtual void	b_read (vsl_b_istream &bfs)
	Load class from binary file stream.
unsigned	k () const
	The number of nearest neighbours to look for.
void	set_k (unsigned)
	Set the number of nearest neighbours to look for.
void	config (vcl_istream &as)
	Initialise the parameters from a text stream.
Static Public Member Functions
static vcl_auto_ptr < clsfy_builder_base >	new_builder (vcl_istream &as)
	Load description from a text stream.
Private Attributes
unsigned	default_class_
	The classification result to always return.

Detailed Description

Builds clsfy_null_classifier.

This class doesn't do any calculation, it is easy to create a null classifier directly - but it allows for consistent swappable classifiers.

Definition at line 26 of file clsfy_null_builder.h.

Constructor & Destructor Documentation

clsfy_null_builder::clsfy_null_builder ( ) [inline]

Definition at line 33 of file clsfy_null_builder.h.

Member Function Documentation

void clsfy_null_builder::b_read ( vsl_b_istream & bfs ) [virtual]

Load class from binary file stream.

Implements clsfy_builder_base.

Definition at line 63 of file clsfy_null_builder.cxx.

void clsfy_null_builder::b_write ( vsl_b_ostream & bfs ) const [virtual]

Save class to binary file stream.

Implements clsfy_builder_base.

Definition at line 54 of file clsfy_null_builder.cxx.

double clsfy_null_builder::build	(	clsfy_classifier_base &	model,
		mbl_data_wrapper< vnl_vector< double > > &	inputs,
		unsigned	nClasses,
		const vcl_vector< unsigned > &	outputs
	)		const `[virtual]`

Build classifier from data.

Build model from data.

return the mean error over the training set.

return the mean error over the training set. For many classifiers, you may use nClasses==1 to indicate a binary classifier

Implements clsfy_builder_base.

Definition at line 87 of file clsfy_null_builder.cxx.

clsfy_builder_base * clsfy_null_builder::clone ( ) const [virtual]

Create a copy on the heap and return base class pointer.

Implements clsfy_builder_base.

Definition at line 40 of file clsfy_null_builder.cxx.

void clsfy_null_builder::config ( vcl_istream & as ) [virtual]

Initialise the parameters from a text stream.

The next non-ws character in the stream should be a '{'

   {
     default_class: 1  (default 0)
   }

Exceptions:

mbl_exception_parse_error if the parse fails.

Reimplemented from clsfy_builder_base.

Definition at line 118 of file clsfy_null_builder.cxx.

vcl_string clsfy_null_builder::is_a ( ) const [virtual]

Name of the class.

Reimplemented from clsfy_builder_base.

Definition at line 26 of file clsfy_null_builder.cxx.

bool clsfy_null_builder::is_class ( vcl_string const & s ) const [virtual]

Name of the class.

Reimplemented from clsfy_builder_base.

Definition at line 33 of file clsfy_null_builder.cxx.

unsigned clsfy_null_builder::k ( ) const

The number of nearest neighbours to look for.

vcl_auto_ptr< clsfy_builder_base > clsfy_builder_base::new_builder ( vcl_istream & as ) [static, inherited]

Load description from a text stream.

The stream should contain the name of the feature extractor class that will be used, followed by a brace-enclosed list of parameters for the builder. This function will construct the appropriate clsfy_builder_base derivative and return that.

Exceptions: