PLearn::ArgminOfVariable Class Reference

#include <ArgminOfVariable.h>

Inheritance diagram for PLearn::ArgminOfVariable:

[legend]Collaboration diagram for PLearn::ArgminOfVariable:

[legend]List of all members.


Public Member Functions
	ArgminOfVariable (Variable the_v, Variable the_expression, Variable *the_values_of_v, const VarArray &the_inputs)
	ArgminOfVariable *.
	PLEARN_DECLARE_OBJECT (ArgminOfVariable)
virtual void	recomputeSize (int &l, int &w) const
	Recomputes the length l and width w that this variable should have, according to its parent variables.
virtual void	makeDeepCopyFromShallowCopy (map< const void , void > &copies)
virtual void	fprop ()
	compute output given input
virtual void	bprop ()
Protected Member Functions
	ArgminOfVariable ()
	protected default constructor for persistence
Protected Attributes
VarArray	inputs
Var	expression
Var	values_of_v
Var	v
int	index_of_argmin
VarArray	vv_path
	values_of_v(inputs)
VarArray	e_path
	expression(v&inputs)
VarArray	v_path
	expression(v)

Detailed Description

returns the value of v within the_values_of_v that gives the lowest value of expression (which may depend on inputs).

Definition at line 54 of file ArgminOfVariable.h.

Constructor & Destructor Documentation

PLearn::ArgminOfVariable::ArgminOfVariable ( ) [inline, protected]

protected default constructor for persistence

Definition at line 58 of file ArgminOfVariable.h.
References e_path, expression, index_of_argmin, inputs, v, v_path, values_of_v, and vv_path.

PLearn::ArgminOfVariable::ArgminOfVariable ( Variable * the_v,

Variable * the_expression,

Variable * the_values_of_v,

const VarArray & the_inputs

)

ArgminOfVariable *.

Definition at line 52 of file ArgminOfVariable.cc.
References e_path, expression, inputs, PLERROR, PLearn::propagationPath(), v, v_path, values_of_v, and vv_path.

Member Function Documentation

void PLearn::ArgminOfVariable::bprop ( ) [virtual]

Implements PLearn::Variable.
Definition at line 111 of file ArgminOfVariable.cc.
References PLearn::VarArray::bprop(), PLearn::VarArray::clearGradient(), index_of_argmin, values_of_v, and vv_path.

void PLearn::ArgminOfVariable::fprop ( ) [virtual]

compute output given input

Implements PLearn::Variable.
Definition at line 87 of file ArgminOfVariable.cc.
References e_path, expression, PLearn::VarArray::fprop(), index_of_argmin, v, v_path, values_of_v, and vv_path.

void PLearn::ArgminOfVariable::makeDeepCopyFromShallowCopy ( map< const void *, void * > & copies ) [virtual]

Reimplemented from PLearn::NaryVariable.
Definition at line 73 of file ArgminOfVariable.cc.
References PLearn::deepCopyField(), e_path, expression, inputs, v, v_path, values_of_v, and vv_path.

PLearn::ArgminOfVariable::PLEARN_DECLARE_OBJECT ( ArgminOfVariable )

void PLearn::ArgminOfVariable::recomputeSize ( int & l,

int & w

) const [virtual]

Recomputes the length l and width w that this variable should have, according to its parent variables.
This is used for ex. by sizeprop() The default version stupidly returns the current dimensions, so make sure to overload it in subclasses if this is not appropriate.
Reimplemented from PLearn::Variable.
Definition at line 69 of file ArgminOfVariable.cc.