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ConstantFunctionComponent Class Reference

#include <nnet-simple-component.h>

Inheritance diagram for ConstantFunctionComponent:
Collaboration diagram for ConstantFunctionComponent:

Public Member Functions

virtual int32 InputDim () const
 Returns input-dimension of this component. More...
 
virtual int32 OutputDim () const
 Returns output-dimension of this component. More...
 
virtual std::string Info () const
 Returns some text-form information about this component, for diagnostics. More...
 
virtual void InitFromConfig (ConfigLine *cfl)
 Initialize, from a ConfigLine object. More...
 
 ConstantFunctionComponent ()
 
 ConstantFunctionComponent (const ConstantFunctionComponent &other)
 
virtual std::string Type () const
 Returns a string such as "SigmoidComponent", describing the type of the object. More...
 
virtual int32 Properties () const
 Return bitmask of the component's properties. More...
 
virtual void * Propagate (const ComponentPrecomputedIndexes *indexes, const CuMatrixBase< BaseFloat > &in, CuMatrixBase< BaseFloat > *out) const
 Propagate function. More...
 
virtual void Backprop (const std::string &debug_info, const ComponentPrecomputedIndexes *indexes, const CuMatrixBase< BaseFloat > &, const CuMatrixBase< BaseFloat > &, const CuMatrixBase< BaseFloat > &out_deriv, void *memo, Component *to_update, CuMatrixBase< BaseFloat > *in_deriv) const
 Backprop function; depending on which of the arguments 'to_update' and 'in_deriv' are non-NULL, this can compute input-data derivatives and/or perform model update. More...
 
virtual void Read (std::istream &is, bool binary)
 Read function (used after we know the type of the Component); accepts input that is missing the token that describes the component type, in case it has already been consumed. More...
 
virtual void Write (std::ostream &os, bool binary) const
 Write component to stream. More...
 
virtual ComponentCopy () const
 Copies component (deep copy). More...
 
virtual void Scale (BaseFloat scale)
 This virtual function when called on – an UpdatableComponent scales the parameters by "scale" when called by an UpdatableComponent. More...
 
virtual void Add (BaseFloat alpha, const Component &other)
 This virtual function when called by – an UpdatableComponent adds the parameters of another updatable component, times some constant, to the current parameters. More...
 
virtual void PerturbParams (BaseFloat stddev)
 This function is to be used in testing. More...
 
virtual BaseFloat DotProduct (const UpdatableComponent &other) const
 Computes dot-product between parameters of two instances of a Component. More...
 
virtual int32 NumParameters () const
 The following new virtual function returns the total dimension of the parameters in this class. More...
 
virtual void Vectorize (VectorBase< BaseFloat > *params) const
 Turns the parameters into vector form. More...
 
virtual void UnVectorize (const VectorBase< BaseFloat > &params)
 Converts the parameters from vector form. More...
 
- Public Member Functions inherited from UpdatableComponent
 UpdatableComponent (const UpdatableComponent &other)
 
 UpdatableComponent ()
 
virtual ~UpdatableComponent ()
 
virtual void SetUnderlyingLearningRate (BaseFloat lrate)
 Sets the learning rate of gradient descent- gets multiplied by learning_rate_factor_. More...
 
virtual void SetActualLearningRate (BaseFloat lrate)
 Sets the learning rate directly, bypassing learning_rate_factor_. More...
 
virtual void SetAsGradient ()
 Sets is_gradient_ to true and sets learning_rate_ to 1, ignoring learning_rate_factor_. More...
 
virtual BaseFloat LearningRateFactor ()
 
virtual void SetLearningRateFactor (BaseFloat lrate_factor)
 
void SetUpdatableConfigs (const UpdatableComponent &other)
 
virtual void FreezeNaturalGradient (bool freeze)
 freezes/unfreezes NaturalGradient updates, if applicable (to be overriden by components that use Natural Gradient). More...
 
BaseFloat LearningRate () const
 Gets the learning rate to be used in gradient descent. More...
 
BaseFloat MaxChange () const
 Returns the per-component max-change value, which is interpreted as the maximum change (in l2 norm) in parameters that is allowed per minibatch for this component. More...
 
void SetMaxChange (BaseFloat max_change)
 
BaseFloat L2Regularization () const
 Returns the l2 regularization constant, which may be set in any updatable component (usually from the config file). More...
 
void SetL2Regularization (BaseFloat a)
 
- Public Member Functions inherited from Component
virtual void StoreStats (const CuMatrixBase< BaseFloat > &in_value, const CuMatrixBase< BaseFloat > &out_value, void *memo)
 This function may store stats on average activation values, and for some component types, the average value of the derivative of the nonlinearity. More...
 
virtual void ZeroStats ()
 Components that provide an implementation of StoreStats should also provide an implementation of ZeroStats(), to set those stats to zero. More...
 
virtual void GetInputIndexes (const MiscComputationInfo &misc_info, const Index &output_index, std::vector< Index > *desired_indexes) const
 This function only does something interesting for non-simple Components. More...
 
virtual bool IsComputable (const MiscComputationInfo &misc_info, const Index &output_index, const IndexSet &input_index_set, std::vector< Index > *used_inputs) const
 This function only does something interesting for non-simple Components, and it exists to make it possible to manage optionally-required inputs. More...
 
virtual void ReorderIndexes (std::vector< Index > *input_indexes, std::vector< Index > *output_indexes) const
 This function only does something interesting for non-simple Components. More...
 
virtual
ComponentPrecomputedIndexes
PrecomputeIndexes (const MiscComputationInfo &misc_info, const std::vector< Index > &input_indexes, const std::vector< Index > &output_indexes, bool need_backprop) const
 This function must return NULL for simple Components. More...
 
virtual void DeleteMemo (void *memo) const
 This virtual function only needs to be overwritten by Components that return a non-NULL memo from their Propagate() function. More...
 
 Component ()
 
virtual ~Component ()
 

Private Member Functions

const ConstantFunctionComponentoperator= (const ConstantFunctionComponent &other)
 

Private Attributes

int32 input_dim_
 
CuVector< BaseFloatoutput_
 
bool is_updatable_
 
bool use_natural_gradient_
 
OnlineNaturalGradient preconditioner_
 

Additional Inherited Members

- Static Public Member Functions inherited from Component
static ComponentReadNew (std::istream &is, bool binary)
 Read component from stream (works out its type). Dies on error. More...
 
static ComponentNewComponentOfType (const std::string &type)
 Returns a new Component of the given type e.g. More...
 
- Protected Member Functions inherited from UpdatableComponent
void InitLearningRatesFromConfig (ConfigLine *cfl)
 
std::string ReadUpdatableCommon (std::istream &is, bool binary)
 
void WriteUpdatableCommon (std::ostream &is, bool binary) const
 
- Protected Attributes inherited from UpdatableComponent
BaseFloat learning_rate_
 learning rate (typically 0.0..0.01) More...
 
BaseFloat learning_rate_factor_
 learning rate factor (normally 1.0, but can be set to another < value so that when < you call SetLearningRate(), that value will be scaled by this factor. More...
 
BaseFloat l2_regularize_
 L2 regularization constant. More...
 
bool is_gradient_
 True if this component is to be treated as a gradient rather than as parameters. More...
 
BaseFloat max_change_
 configuration value for imposing max-change More...
 

Detailed Description

Definition at line 1575 of file nnet-simple-component.h.

Constructor & Destructor Documentation

Definition at line 2495 of file nnet-simple-component.cc.

2496  :
2497  UpdatableComponent(other), input_dim_(other.input_dim_),
2498  output_(other.output_), is_updatable_(other.is_updatable_),
2499  use_natural_gradient_(other.use_natural_gradient_),
2500  preconditioner_(other.preconditioner_) { }

Member Function Documentation

void Add ( BaseFloat  alpha,
const Component other 
)
virtual

This virtual function when called by – an UpdatableComponent adds the parameters of another updatable component, times some constant, to the current parameters.

– a NonlinearComponent (or another component that stores stats, like BatchNormComponent)– it relates to adding stats. Otherwise it will normally do nothing.

Reimplemented from Component.

Definition at line 2609 of file nnet-simple-component.cc.

References CuVectorBase< Real >::AddVec(), ConstantFunctionComponent::is_updatable_, KALDI_ASSERT, and ConstantFunctionComponent::output_.

2609  {
2610  if (is_updatable_) {
2611  const ConstantFunctionComponent *other =
2612  dynamic_cast<const ConstantFunctionComponent*>(&other_in);
2613  KALDI_ASSERT(other != NULL);
2614  output_.AddVec(alpha, other->output_);
2615  }
2616 }
#define KALDI_ASSERT(cond)
Definition: kaldi-error.h:169
void AddVec(Real alpha, const CuVectorBase< Real > &vec, Real beta=1.0)
Definition: cu-vector.cc:1182
void Backprop ( const std::string &  debug_info,
const ComponentPrecomputedIndexes indexes,
const CuMatrixBase< BaseFloat > &  in_value,
const CuMatrixBase< BaseFloat > &  out_value,
const CuMatrixBase< BaseFloat > &  out_deriv,
void *  memo,
Component to_update,
CuMatrixBase< BaseFloat > *  in_deriv 
) const
virtual

Backprop function; depending on which of the arguments 'to_update' and 'in_deriv' are non-NULL, this can compute input-data derivatives and/or perform model update.

Parameters
[in]debug_infoThe component name, to be printed out in any warning messages.
[in]indexesA pointer to some information output by this class's PrecomputeIndexes function (will be NULL for simple components, i.e. those that don't do things like splicing).
[in]in_valueThe matrix that was given as input to the Propagate function. Will be ignored (and may be empty) if Properties()&kBackpropNeedsInput == 0.
[in]out_valueThe matrix that was output from the Propagate function. Will be ignored (and may be empty) if Properties()&kBackpropNeedsOutput == 0
[in]out_derivThe derivative at the output of this component.
[in]memoThis will normally be NULL, but for component types that set the flag kUsesMemo, this will be the return value of the Propagate() function that corresponds to this Backprop() function. Ownership of any pointers is not transferred to the Backprop function; DeleteMemo() will be called to delete it.
[out]to_updateIf model update is desired, the Component to be updated, else NULL. Does not have to be identical to this. If supplied, you can assume that to_update->Properties() & kUpdatableComponent is nonzero.
[out]in_derivThe derivative at the input of this component, if needed (else NULL). If Properties()&kBackpropInPlace, may be the same matrix as out_deriv. If Properties()&kBackpropAdds, this is added to by the Backprop routine, else it is set. The component code chooses which mode to work in, based on convenience.

Implements Component.

Definition at line 2510 of file nnet-simple-component.cc.

References CuVectorBase< Real >::AddRowSumMat(), UpdatableComponent::is_gradient_, ConstantFunctionComponent::is_updatable_, KALDI_ASSERT, UpdatableComponent::learning_rate_, ConstantFunctionComponent::output_, OnlineNaturalGradient::PreconditionDirections(), ConstantFunctionComponent::preconditioner_, and ConstantFunctionComponent::use_natural_gradient_.

2518  {
2519  // we don't update in_deriv, since we set the flag
2520  // kBackpropAdds, and the output doesn't depend on the
2521  // input, so the input-derivative is zero.
2522  if (to_update_in) {
2523  ConstantFunctionComponent *to_update =
2524  dynamic_cast<ConstantFunctionComponent*>(to_update_in);
2525  if (to_update->is_updatable_) {
2526  // only do the update if the is_updatable_ flag is set.
2527  KALDI_ASSERT(to_update && to_update->is_updatable_);
2528  if (to_update->use_natural_gradient_ && !to_update->is_gradient_) {
2529  CuMatrix<BaseFloat> out_deriv_copy(out_deriv);
2530  BaseFloat scale = 1.0;
2531  to_update->preconditioner_.PreconditionDirections(&out_deriv_copy,
2532  &scale);
2533  to_update->output_.AddRowSumMat(scale * to_update->learning_rate_,
2534  out_deriv_copy);
2535  } else {
2536  to_update->output_.AddRowSumMat(to_update->learning_rate_,
2537  out_deriv);
2538  }
2539  }
2540  }
2541 }
float BaseFloat
Definition: kaldi-types.h:29
#define KALDI_ASSERT(cond)
Definition: kaldi-error.h:169
Component * Copy ( ) const
virtual

Copies component (deep copy).

Implements Component.

Definition at line 2595 of file nnet-simple-component.cc.

References ConstantFunctionComponent::ConstantFunctionComponent().

2595  {
2596  return new ConstantFunctionComponent(*this);
2597 }
BaseFloat DotProduct ( const UpdatableComponent other) const
virtual

Computes dot-product between parameters of two instances of a Component.

Can be used for computing parameter-norm of an UpdatableComponent.

Implements UpdatableComponent.

Definition at line 2624 of file nnet-simple-component.cc.

References ConstantFunctionComponent::is_updatable_, KALDI_ASSERT, ConstantFunctionComponent::output_, and kaldi::VecVec().

2625  {
2627  const ConstantFunctionComponent *other =
2628  dynamic_cast<const ConstantFunctionComponent*>(&other_in);
2629  KALDI_ASSERT(other != NULL);
2630  return VecVec(output_, other->output_);
2631 }
#define KALDI_ASSERT(cond)
Definition: kaldi-error.h:169
Real VecVec(const VectorBase< Real > &a, const VectorBase< Real > &b)
Returns dot product between v1 and v2.
Definition: kaldi-vector.cc:37
std::string Info ( ) const
virtual

Returns some text-form information about this component, for diagnostics.

Starts with the type of the component. E.g. "SigmoidComponent dim=900", although most components will have much more info.

Reimplemented from UpdatableComponent.

Definition at line 2479 of file nnet-simple-component.cc.

References UpdatableComponent::Info(), ConstantFunctionComponent::InputDim(), ConstantFunctionComponent::is_updatable_, ConstantFunctionComponent::output_, ConstantFunctionComponent::OutputDim(), kaldi::nnet3::PrintParameterStats(), ConstantFunctionComponent::Type(), and ConstantFunctionComponent::use_natural_gradient_.

2479  {
2480  std::ostringstream stream;
2481  stream << UpdatableComponent::Info()
2482  << ", " << Type() << ", input-dim=" << InputDim()
2483  << ", output-dim=" << OutputDim()
2484  << ", is-updatable=" << std::boolalpha << is_updatable_
2485  << ", use-natural-gradient=" << std::boolalpha
2487  PrintParameterStats(stream, "output", output_, true);
2488  return stream.str();
2489 }
virtual std::string Type() const
Returns a string such as "SigmoidComponent", describing the type of the object.
virtual std::string Info() const
Returns some text-form information about this component, for diagnostics.
void PrintParameterStats(std::ostringstream &os, const std::string &name, const CuVectorBase< BaseFloat > &params, bool include_mean)
Print to 'os' some information about the mean and standard deviation of some parameters, used in Info() functions in nnet-simple-component.cc.
Definition: nnet-parse.cc:530
virtual int32 OutputDim() const
Returns output-dimension of this component.
virtual int32 InputDim() const
Returns input-dimension of this component.
void InitFromConfig ( ConfigLine cfl)
virtual

Initialize, from a ConfigLine object.

Parameters
[in]cflA ConfigLine containing any parameters that are needed for initialization. For example: "dim=100 param-stddev=0.1"

Implements Component.

Definition at line 2633 of file nnet-simple-component.cc.

References VectorBase< Real >::Add(), ConfigLine::GetValue(), ConfigLine::HasUnusedValues(), UpdatableComponent::InitLearningRatesFromConfig(), ConstantFunctionComponent::input_dim_, ConstantFunctionComponent::is_updatable_, KALDI_ERR, ConstantFunctionComponent::output_, VectorBase< Real >::Scale(), VectorBase< Real >::SetRandn(), ConstantFunctionComponent::use_natural_gradient_, and ConfigLine::WholeLine().

2633  {
2634  int32 output_dim = 0;
2636  bool ok = cfl->GetValue("output-dim", &output_dim) &&
2637  cfl->GetValue("input-dim", &input_dim_);
2638  cfl->GetValue("is-updatable", &is_updatable_);
2639  cfl->GetValue("use-natural-gradient", &use_natural_gradient_);
2640  BaseFloat output_mean = 0.0, output_stddev = 0.0;
2641  cfl->GetValue("output-mean", &output_mean);
2642  cfl->GetValue("output-stddev", &output_stddev);
2643  if (!ok || cfl->HasUnusedValues() || input_dim_ <= 0 ||
2644  output_dim <= 0) {
2645  KALDI_ERR << "Bad initializer " << cfl->WholeLine();
2646  }
2647  Vector<BaseFloat> output(output_dim);
2648  output.SetRandn();
2649  output.Scale(output_stddev);
2650  output.Add(output_mean);
2651  output_ = output;
2652 }
void InitLearningRatesFromConfig(ConfigLine *cfl)
float BaseFloat
Definition: kaldi-types.h:29
#define KALDI_ERR
Definition: kaldi-error.h:127
virtual int32 InputDim ( ) const
inlinevirtual

Returns input-dimension of this component.

Implements Component.

Definition at line 1577 of file nnet-simple-component.h.

References ConstantFunctionComponent::input_dim_.

Referenced by ConstantFunctionComponent::Info(), and ConstantFunctionComponent::Properties().

int32 NumParameters ( ) const
virtual

The following new virtual function returns the total dimension of the parameters in this class.

Reimplemented from UpdatableComponent.

Definition at line 2654 of file nnet-simple-component.cc.

References CuVectorBase< Real >::Dim(), ConstantFunctionComponent::is_updatable_, KALDI_ASSERT, and ConstantFunctionComponent::output_.

2654  {
2656  return output_.Dim();
2657 }
MatrixIndexT Dim() const
Dimensions.
Definition: cu-vector.h:68
#define KALDI_ASSERT(cond)
Definition: kaldi-error.h:169
const ConstantFunctionComponent& operator= ( const ConstantFunctionComponent other)
private
virtual int32 OutputDim ( ) const
inlinevirtual

Returns output-dimension of this component.

Implements Component.

Definition at line 1578 of file nnet-simple-component.h.

References CuVectorBase< Real >::Dim(), and ConstantFunctionComponent::output_.

Referenced by ConstantFunctionComponent::Info(), and ConstantFunctionComponent::Properties().

1578 { return output_.Dim(); }
MatrixIndexT Dim() const
Dimensions.
Definition: cu-vector.h:68
void PerturbParams ( BaseFloat  stddev)
virtual

This function is to be used in testing.

It adds unit noise times "stddev" to the parameters of the component.

Implements UpdatableComponent.

Definition at line 2618 of file nnet-simple-component.cc.

References CuVectorBase< Real >::AddVec(), CuVectorBase< Real >::Dim(), kaldi::kUndefined, ConstantFunctionComponent::output_, and CuVectorBase< Real >::SetRandn().

2618  {
2619  CuVector<BaseFloat> temp_output(output_.Dim(), kUndefined);
2620  temp_output.SetRandn();
2621  output_.AddVec(stddev, temp_output);
2622 }
MatrixIndexT Dim() const
Dimensions.
Definition: cu-vector.h:68
void AddVec(Real alpha, const CuVectorBase< Real > &vec, Real beta=1.0)
Definition: cu-vector.cc:1182
void * Propagate ( const ComponentPrecomputedIndexes indexes,
const CuMatrixBase< BaseFloat > &  in,
CuMatrixBase< BaseFloat > *  out 
) const
virtual

Propagate function.

Parameters
[in]indexesA pointer to some information output by this class's PrecomputeIndexes function (will be NULL for simple components, i.e. those that don't do things like splicing).
[in]inThe input to this component. Num-columns == InputDim().
[out]outThe output of this component. Num-columns == OutputDim(). Note: output of this component will be added to the initial value of "out" if Properties()&kPropagateAdds != 0; otherwise the output will be set and the initial value ignored. Each Component chooses whether it is more convenient implementation-wise to add or set, and the calling code has to deal with it.
Returns
Normally returns NULL, but may return a non-NULL value for components which have the flag kUsesMemo set. This value will be passed into the corresponding Backprop routine.

Implements Component.

Definition at line 2502 of file nnet-simple-component.cc.

References CuMatrixBase< Real >::CopyRowsFromVec(), and ConstantFunctionComponent::output_.

2505  {
2506  out->CopyRowsFromVec(output_);
2507  return NULL;
2508 }
void CopyRowsFromVec(const CuVectorBase< Real > &v)
This function has two modes of operation.
Definition: cu-matrix.cc:2282
virtual int32 Properties ( ) const
inlinevirtual

Return bitmask of the component's properties.

These properties depend only on the component's type. See enum ComponentProperties.

Implements Component.

Definition at line 1591 of file nnet-simple-component.h.

References ConstantFunctionComponent::InputDim(), ConstantFunctionComponent::is_updatable_, kaldi::nnet3::kBackpropAdds, kaldi::nnet3::kPropagateInPlace, kaldi::nnet3::kSimpleComponent, kaldi::nnet3::kUpdatableComponent, and ConstantFunctionComponent::OutputDim().

void Read ( std::istream &  is,
bool  binary 
)
virtual

Read function (used after we know the type of the Component); accepts input that is missing the token that describes the component type, in case it has already been consumed.

Implements Component.

Definition at line 2543 of file nnet-simple-component.cc.

References kaldi::nnet3::ExpectToken(), ConstantFunctionComponent::input_dim_, UpdatableComponent::is_gradient_, ConstantFunctionComponent::is_updatable_, KALDI_ERR, UpdatableComponent::learning_rate_, UpdatableComponent::learning_rate_factor_, ConstantFunctionComponent::output_, CuVector< Real >::Read(), kaldi::ReadBasicType(), kaldi::ReadToken(), and ConstantFunctionComponent::use_natural_gradient_.

2543  {
2544  std::string token;
2545  ReadToken(is, binary, &token);
2546  if (token == "<ConstantFunctionComponent>") {
2547  ReadToken(is, binary, &token);
2548  }
2549  if (token == "<LearningRateFactor>") {
2550  ReadBasicType(is, binary, &learning_rate_factor_);
2551  ReadToken(is, binary, &token);
2552  } else {
2553  learning_rate_factor_ = 1.0;
2554  }
2555  if (token == "<IsGradient>") {
2556  ReadBasicType(is, binary, &is_gradient_);
2557  ReadToken(is, binary, &token);
2558  } else {
2559  is_gradient_ = false;
2560  }
2561  if (token == "<LearningRate>") {
2562  ReadBasicType(is, binary, &learning_rate_);
2563  ReadToken(is, binary, &token);
2564  } else {
2565  learning_rate_ = 0.001;
2566  }
2567  if (token == "<InputDim>") {
2568  ReadBasicType(is, binary, &input_dim_);
2569  } else {
2570  KALDI_ERR << "Expected token <InputDim>, got "
2571  << token;
2572  }
2573  ExpectToken(is, binary, "<Output>");
2574  output_.Read(is, binary);
2575  ExpectToken(is, binary, "<IsUpdatable>");
2576  ReadBasicType(is, binary, &is_updatable_);
2577  ExpectToken(is, binary, "<UseNaturalGradient>");
2578  ReadBasicType(is, binary, &use_natural_gradient_);
2579  ExpectToken(is, binary, "</ConstantFunctionComponent>");
2580 }
void ReadBasicType(std::istream &is, bool binary, T *t)
ReadBasicType is the name of the read function for bool, integer types, and floating-point types...
Definition: io-funcs-inl.h:55
void Read(std::istream &is, bool binary)
I/O.
Definition: cu-vector.cc:911
void ReadToken(std::istream &is, bool binary, std::string *str)
ReadToken gets the next token and puts it in str (exception on failure).
Definition: io-funcs.cc:154
static void ExpectToken(const std::string &token, const std::string &what_we_are_parsing, const std::string **next_token)
BaseFloat learning_rate_
learning rate (typically 0.0..0.01)
#define KALDI_ERR
Definition: kaldi-error.h:127
BaseFloat learning_rate_factor_
learning rate factor (normally 1.0, but can be set to another < value so that when < you call SetLear...
bool is_gradient_
True if this component is to be treated as a gradient rather than as parameters.
void Scale ( BaseFloat  scale)
virtual

This virtual function when called on – an UpdatableComponent scales the parameters by "scale" when called by an UpdatableComponent.

– a Nonlinear component (or another component that stores stats, like BatchNormComponent)– it relates to scaling activation stats, not parameters. Otherwise it will normally do nothing.

Reimplemented from Component.

Definition at line 2599 of file nnet-simple-component.cc.

References ConstantFunctionComponent::is_updatable_, ConstantFunctionComponent::output_, CuVectorBase< Real >::Scale(), and CuVectorBase< Real >::SetZero().

2599  {
2600  if (is_updatable_) {
2601  if (scale == 0.0) {
2602  output_.SetZero();
2603  } else {
2604  output_.Scale(scale);
2605  }
2606  }
2607 }
void Scale(Real value)
Definition: cu-vector.cc:1161
void SetZero()
Math operations.
Definition: cu-vector.cc:1044
virtual std::string Type ( ) const
inlinevirtual

Returns a string such as "SigmoidComponent", describing the type of the object.

Implements Component.

Definition at line 1590 of file nnet-simple-component.h.

Referenced by ConstantFunctionComponent::Info().

1590 { return "ConstantFunctionComponent"; }
void UnVectorize ( const VectorBase< BaseFloat > &  params)
virtual

Converts the parameters from vector form.

Reimplemented from UpdatableComponent.

Definition at line 2663 of file nnet-simple-component.cc.

References CuVectorBase< Real >::CopyFromVec(), and ConstantFunctionComponent::output_.

2663  {
2664  output_.CopyFromVec(params);
2665 }
void CopyFromVec(const CuVectorBase< Real > &src)
Copy functions; these will crash if the dimension do not match.
Definition: cu-vector.cc:1026
void Vectorize ( VectorBase< BaseFloat > *  params) const
virtual

Turns the parameters into vector form.

We put the vector form on the CPU, because in the kinds of situations where we do this, we'll tend to use too much memory for the GPU.

Reimplemented from UpdatableComponent.

Definition at line 2659 of file nnet-simple-component.cc.

References VectorBase< Real >::CopyFromVec(), and ConstantFunctionComponent::output_.

2659  {
2660  params->CopyFromVec(output_);
2661 }
void CopyFromVec(const VectorBase< Real > &v)
Copy data from another vector (must match own size).
void Write ( std::ostream &  os,
bool  binary 
) const
virtual

Write component to stream.

Implements Component.

Definition at line 2582 of file nnet-simple-component.cc.

References ConstantFunctionComponent::input_dim_, ConstantFunctionComponent::is_updatable_, ConstantFunctionComponent::output_, ConstantFunctionComponent::use_natural_gradient_, CuVector< Real >::Write(), kaldi::WriteBasicType(), kaldi::WriteToken(), and UpdatableComponent::WriteUpdatableCommon().

2582  {
2583  WriteUpdatableCommon(os, binary); // Write the opening tag and learning rate
2584  WriteToken(os, binary, "<InputDim>");
2585  WriteBasicType(os, binary, input_dim_);
2586  WriteToken(os, binary, "<Output>");
2587  output_.Write(os, binary);
2588  WriteToken(os, binary, "<IsUpdatable>");
2589  WriteBasicType(os, binary, is_updatable_);
2590  WriteToken(os, binary, "<UseNaturalGradient>");
2592  WriteToken(os, binary, "</ConstantFunctionComponent>");
2593 }
void Write(std::ostream &is, bool binary) const
Definition: cu-vector.cc:921
void WriteUpdatableCommon(std::ostream &is, bool binary) const
void WriteToken(std::ostream &os, bool binary, const char *token)
The WriteToken functions are for writing nonempty sequences of non-space characters.
Definition: io-funcs.cc:134
void WriteBasicType(std::ostream &os, bool binary, T t)
WriteBasicType is the name of the write function for bool, integer types, and floating-point types...
Definition: io-funcs-inl.h:34

Member Data Documentation

OnlineNaturalGradient preconditioner_
private

Definition at line 1630 of file nnet-simple-component.h.

Referenced by ConstantFunctionComponent::Backprop().


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