Sigmoid Class Reference

#include <nnet-activation.h>

Inheritance diagram for Sigmoid:

Collaboration diagram for Sigmoid:

Public Member Functions
	Sigmoid (int32 dim_in, int32 dim_out)
	~Sigmoid ()
Component *	Copy () const
	Copy component (deep copy),. More...
ComponentType	GetType () const
	Get Type Identification of the component,. More...
void	PropagateFnc (const CuMatrixBase< BaseFloat > &in, CuMatrixBase< BaseFloat > *out)
	Abstract interface for propagation/backpropagation. More...
void	BackpropagateFnc (const CuMatrixBase< BaseFloat > &in, const CuMatrixBase< BaseFloat > &out, const CuMatrixBase< BaseFloat > &out_diff, CuMatrixBase< BaseFloat > *in_diff)
	Backward pass transformation (to be implemented by descending class...) More...
Public Member Functions inherited from Component
	Component (int32 input_dim, int32 output_dim)
	Generic interface of a component,. More...
virtual	~Component ()
virtual bool	IsUpdatable () const
	Check if componeny has 'Updatable' interface (trainable components),. More...
virtual bool	IsMultistream () const
	Check if component has 'Recurrent' interface (trainable and recurrent),. More...
int32	InputDim () const
	Get the dimension of the input,. More...
int32	OutputDim () const
	Get the dimension of the output,. More...
void	Propagate (const CuMatrixBase< BaseFloat > &in, CuMatrix< BaseFloat > *out)
	Perform forward-pass propagation 'in' -> 'out',. More...
void	Backpropagate (const CuMatrixBase< BaseFloat > &in, const CuMatrixBase< BaseFloat > &out, const CuMatrixBase< BaseFloat > &out_diff, CuMatrix< BaseFloat > *in_diff)
	Perform backward-pass propagation 'out_diff' -> 'in_diff'. More...
void	Write (std::ostream &os, bool binary) const
	Write the component to a stream,. More...
virtual std::string	Info () const
	Print some additional info (after <ComponentName> and the dims),. More...
virtual std::string	InfoGradient () const
	Print some additional info about gradient (after <...> and dims),. More...

Additional Inherited Members
Public Types inherited from Component
enum	ComponentType {   kUnknown = 0x0, kUpdatableComponent = 0x0100, kAffineTransform, kLinearTransform,   kConvolutionalComponent, kLstmProjected, kBlstmProjected, kRecurrentComponent,   kActivationFunction = 0x0200, kSoftmax, kHiddenSoftmax, kBlockSoftmax,   kSigmoid, kTanh, kParametricRelu, kDropout,   kLengthNormComponent, kTranform = 0x0400, kRbm, kSplice,   kCopy, kTranspose, kBlockLinearity, kAddShift,   kRescale, kKlHmm = 0x0800, kSentenceAveragingComponent, kSimpleSentenceAveragingComponent,   kAveragePoolingComponent, kMaxPoolingComponent, kFramePoolingComponent, kParallelComponent,   kMultiBasisComponent }
	Component type identification mechanism,. More...
Static Public Member Functions inherited from Component
static const char *	TypeToMarker (ComponentType t)
	Converts component type to marker,. More...
static ComponentType	MarkerToType (const std::string &s)
	Converts marker to component type (case insensitive),. More...
static Component *	Init (const std::string &conf_line)
	Initialize component from a line in config file,. More...
static Component *	Read (std::istream &is, bool binary)
	Read the component from a stream (static method),. More...
Static Public Attributes inherited from Component
static const struct key_value	kMarkerMap []
	The table with pairs of Component types and markers (defined in nnet-component.cc),. More...
Protected Member Functions inherited from Component
virtual void	InitData (std::istream &is)
	Virtual interface for initialization and I/O,. More...
virtual void	ReadData (std::istream &is, bool binary)
	Reads the component content. More...
virtual void	WriteData (std::ostream &os, bool binary) const
	Writes the component content. More...
Protected Attributes inherited from Component
int32	input_dim_
	Data members,. More...
int32	output_dim_
	Dimension of the output of the Component,. More...

Detailed Description

Definition at line 211 of file nnet-activation.h.

Constructor & Destructor Documentation

Sigmoid()

Sigmoid ( int32  dim_in, int32  dim_out  )

inline

Definition at line 213 of file nnet-activation.h.

                                      :
    Component(dim_in, dim_out)
  { }

~Sigmoid()

~Sigmoid ( )

inline

Definition at line 217 of file nnet-activation.h.

  { }

Member Function Documentation

BackpropagateFnc()

void BackpropagateFnc ( const CuMatrixBase< BaseFloat > &  in, const CuMatrixBase< BaseFloat > &  out, const CuMatrixBase< BaseFloat > &  out_diff, CuMatrixBase< BaseFloat > *  in_diff  )

inlinevirtual

Backward pass transformation (to be implemented by descending class...)

Implements Component.

Definition at line 229 of file nnet-activation.h.

References CuMatrixBase< Real >::DiffSigmoid().

                                                          {
    // ey = y(1-y)ex,
    in_diff->DiffSigmoid(out, out_diff);
  }

Copy()

Component* Copy ( ) const

inlinevirtual

Copy component (deep copy),.

Implements Component.

Definition at line 220 of file nnet-activation.h.

{ return new Sigmoid(*this); }

GetType()

ComponentType GetType ( ) const

inlinevirtual

Get Type Identification of the component,.

Implements Component.

Definition at line 221 of file nnet-activation.h.

References Component::kSigmoid.

{ return kSigmoid; }

PropagateFnc()

void PropagateFnc ( const CuMatrixBase< BaseFloat > &  in, CuMatrixBase< BaseFloat > *  out  )

inlinevirtual

Abstract interface for propagation/backpropagation.

Forward pass transformation (to be implemented by descending class...)

Implements Component.

Definition at line 223 of file nnet-activation.h.

References CuMatrixBase< Real >::Sigmoid().

                                                  {
    // y = 1/(1+e^-x)
    out->Sigmoid(in);
  }

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

• nnet/nnet-activation.h