PLearn 0.1
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#include <ElementAtPositionVariable.h>
Public Member Functions | |
ElementAtPositionVariable () | |
Default constructor for persistence. | |
ElementAtPositionVariable (Variable *input1, Variable *input2, int the_length, int the_width) | |
virtual string | classname () const |
virtual OptionList & | getOptionList () const |
virtual OptionMap & | getOptionMap () const |
virtual RemoteMethodMap & | getRemoteMethodMap () const |
virtual ElementAtPositionVariable * | deepCopy (CopiesMap &copies) const |
virtual void | build () |
Post-constructor. | |
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 | fprop () |
compute output given input | |
virtual void | bprop () |
virtual void | symbolicBprop () |
compute a piece of new Var graph that represents the symbolic derivative of this Var | |
virtual void | rfprop () |
Static Public Member Functions | |
static string | _classname_ () |
ElementAtPositionVariable. | |
static OptionList & | _getOptionList_ () |
static RemoteMethodMap & | _getRemoteMethodMap_ () |
static Object * | _new_instance_for_typemap_ () |
static bool | _isa_ (const Object *o) |
static void | _static_initialize_ () |
static const PPath & | declaringFile () |
static void | declareOptions (OptionList &ol) |
Declare options (data fields) for the class. | |
Static Public Attributes | |
static StaticInitializer | _static_initializer_ |
Protected Member Functions | |
void | build_ () |
This does the actual building. | |
Protected Attributes | |
int | length_ |
int | width_ |
Private Types | |
typedef BinaryVariable | inherited |
A variable of size length() x width(), filled with zeros except for the single element indexed by input2 =(i,j) or input2 = (k). This element will be a copied from input1 (a scalar) (this is used in particular for the symbolic bprop of VarElementVariable)
Definition at line 57 of file ElementAtPositionVariable.h.
typedef BinaryVariable PLearn::ElementAtPositionVariable::inherited [private] |
Reimplemented from PLearn::BinaryVariable.
Definition at line 59 of file ElementAtPositionVariable.h.
PLearn::ElementAtPositionVariable::ElementAtPositionVariable | ( | ) |
Default constructor for persistence.
Definition at line 58 of file ElementAtPositionVariable.cc.
string PLearn::ElementAtPositionVariable::_classname_ | ( | ) | [static] |
Reimplemented from PLearn::BinaryVariable.
Definition at line 56 of file ElementAtPositionVariable.cc.
OptionList & PLearn::ElementAtPositionVariable::_getOptionList_ | ( | ) | [static] |
Reimplemented from PLearn::BinaryVariable.
Definition at line 56 of file ElementAtPositionVariable.cc.
RemoteMethodMap & PLearn::ElementAtPositionVariable::_getRemoteMethodMap_ | ( | ) | [static] |
Reimplemented from PLearn::BinaryVariable.
Definition at line 56 of file ElementAtPositionVariable.cc.
Reimplemented from PLearn::BinaryVariable.
Definition at line 56 of file ElementAtPositionVariable.cc.
Object * PLearn::ElementAtPositionVariable::_new_instance_for_typemap_ | ( | ) | [static] |
Reimplemented from PLearn::Object.
Definition at line 56 of file ElementAtPositionVariable.cc.
StaticInitializer ElementAtPositionVariable::_static_initializer_ & PLearn::ElementAtPositionVariable::_static_initialize_ | ( | ) | [static] |
Reimplemented from PLearn::BinaryVariable.
Definition at line 56 of file ElementAtPositionVariable.cc.
void PLearn::ElementAtPositionVariable::bprop | ( | ) | [virtual] |
Implements PLearn::Variable.
Definition at line 113 of file ElementAtPositionVariable.cc.
References PLearn::Variable::gradientdata, i, PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, j, and PLearn::Variable::width().
{ if (input2->isScalar()) // input2 is a scalar (interpreted as a k) { int k = (int)input2->valuedata[0]; input1->gradientdata[0] += gradientdata[k]; } else // input2 has 2 elements (interpreted as (i,j) coordinates) { int i = (int)input2->valuedata[0]; int j = (int)input2->valuedata[1]; input1->gradientdata[0] += gradientdata[i*width()+j]; } }
void PLearn::ElementAtPositionVariable::build | ( | ) | [virtual] |
Post-constructor.
The normal implementation should call simply inherited::build(), then this class's build_(). This method should be callable again at later times, after modifying some option fields to change the "architecture" of the object.
Reimplemented from PLearn::BinaryVariable.
Definition at line 70 of file ElementAtPositionVariable.cc.
References PLearn::BinaryVariable::build(), and build_().
{ inherited::build(); build_(); }
void PLearn::ElementAtPositionVariable::build_ | ( | ) | [protected] |
This does the actual building.
Reimplemented from PLearn::BinaryVariable.
Definition at line 77 of file ElementAtPositionVariable.cc.
References PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, and PLERROR.
Referenced by build(), and ElementAtPositionVariable().
{ if (input1 && !input1->isScalar()) PLERROR("In ElementAtPositionVariable: element must be a scalar var"); if (input2 && input2->nelems()>2) PLERROR("In ElementAtPositionVariable: position must have 1 or 2 elements"); }
string PLearn::ElementAtPositionVariable::classname | ( | ) | const [virtual] |
Reimplemented from PLearn::Object.
Definition at line 56 of file ElementAtPositionVariable.cc.
void PLearn::ElementAtPositionVariable::declareOptions | ( | OptionList & | ol | ) | [static] |
Declare options (data fields) for the class.
Redefine this in subclasses: call declareOption
(...) for each option, and then call inherited::declareOptions(options)
. Please call the inherited
method AT THE END to get the options listed in a consistent order (from most recently defined to least recently defined).
static void MyDerivedClass::declareOptions(OptionList& ol) { declareOption(ol, "inputsize", &MyObject::inputsize_, OptionBase::buildoption, "The size of the input; it must be provided"); declareOption(ol, "weights", &MyObject::weights, OptionBase::learntoption, "The learned model weights"); inherited::declareOptions(ol); }
ol | List of options that is progressively being constructed for the current class. |
Reimplemented from PLearn::BinaryVariable.
Definition at line 86 of file ElementAtPositionVariable.cc.
References PLearn::OptionBase::buildoption, PLearn::declareOption(), PLearn::BinaryVariable::declareOptions(), length_, and width_.
{ declareOption(ol, "length_", &ElementAtPositionVariable::length_, OptionBase::buildoption, ""); declareOption(ol, "width_", &ElementAtPositionVariable::width_, OptionBase::buildoption, ""); inherited::declareOptions(ol); }
static const PPath& PLearn::ElementAtPositionVariable::declaringFile | ( | ) | [inline, static] |
Reimplemented from PLearn::BinaryVariable.
Definition at line 69 of file ElementAtPositionVariable.h.
: void build_();
ElementAtPositionVariable * PLearn::ElementAtPositionVariable::deepCopy | ( | CopiesMap & | copies | ) | const [virtual] |
Reimplemented from PLearn::BinaryVariable.
Definition at line 56 of file ElementAtPositionVariable.cc.
void PLearn::ElementAtPositionVariable::fprop | ( | ) | [virtual] |
compute output given input
Implements PLearn::Variable.
Definition at line 96 of file ElementAtPositionVariable.cc.
References PLearn::TVec< T >::clear(), i, PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, j, PLearn::Variable::value, PLearn::Variable::valuedata, and PLearn::Variable::width().
{ value.clear(); if (input2->isScalar()) // input2 is a scalar (interpreted as a k) { int k = (int)input2->valuedata[0]; valuedata[k] = input1->valuedata[0]; } else // input2 has 2 elements (interpreted as (i,j) coordinates) { int i = (int)input2->valuedata[0]; int j = (int)input2->valuedata[1]; valuedata[i*width()+j] = input1->valuedata[0]; } }
OptionList & PLearn::ElementAtPositionVariable::getOptionList | ( | ) | const [virtual] |
Reimplemented from PLearn::Object.
Definition at line 56 of file ElementAtPositionVariable.cc.
OptionMap & PLearn::ElementAtPositionVariable::getOptionMap | ( | ) | const [virtual] |
Reimplemented from PLearn::Object.
Definition at line 56 of file ElementAtPositionVariable.cc.
RemoteMethodMap & PLearn::ElementAtPositionVariable::getRemoteMethodMap | ( | ) | const [virtual] |
Reimplemented from PLearn::Object.
Definition at line 56 of file ElementAtPositionVariable.cc.
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 93 of file ElementAtPositionVariable.cc.
void PLearn::ElementAtPositionVariable::rfprop | ( | ) | [virtual] |
Reimplemented from PLearn::Variable.
Definition at line 136 of file ElementAtPositionVariable.cc.
References PLearn::TVec< T >::clear(), i, PLearn::BinaryVariable::input1, PLearn::BinaryVariable::input2, j, PLearn::TVec< T >::length(), PLearn::BinaryVariable::resizeRValue(), PLearn::Variable::rValue, PLearn::Variable::rvaluedata, and PLearn::Variable::width().
{ if (rValue.length()==0) resizeRValue(); rValue.clear(); if (input2->isScalar()) // input2 is a scalar (interpreted as a k) { int k = (int)input2->valuedata[0]; rvaluedata[k] = input1->rvaluedata[0]; } else // input2 has 2 elements (interpreted as (i,j) coordinates) { int i = (int)input2->valuedata[0]; int j = (int)input2->valuedata[1]; rvaluedata[i*width()+j] = input1->rvaluedata[0]; } }
void PLearn::ElementAtPositionVariable::symbolicBprop | ( | ) | [virtual] |
compute a piece of new Var graph that represents the symbolic derivative of this Var
Reimplemented from PLearn::Variable.
Definition at line 129 of file ElementAtPositionVariable.cc.
References PLearn::Variable::g, PLearn::BinaryVariable::input1, and PLearn::BinaryVariable::input2.
Reimplemented from PLearn::BinaryVariable.
Definition at line 69 of file ElementAtPositionVariable.h.
int PLearn::ElementAtPositionVariable::length_ [protected] |
Definition at line 62 of file ElementAtPositionVariable.h.
Referenced by declareOptions(), and recomputeSize().
int PLearn::ElementAtPositionVariable::width_ [protected] |
Definition at line 62 of file ElementAtPositionVariable.h.
Referenced by declareOptions(), and recomputeSize().