PLearn::SelectRowsVMatrix Class Reference

selects samples from a source matrix according to given vector of indices More...

#include <SelectRowsVMatrix.h>

Inheritance diagram for PLearn::SelectRowsVMatrix:

[legend]Collaboration diagram for PLearn::SelectRowsVMatrix:

[legend]List of all members.


Public Member Functions
	SelectRowsVMatrix ()
	SelectRowsVMatrix (VMat the_source, TVec< int > the_indices)
	Also copies the original fieldinfos upon construction Here the indices will be shared for efficiency.
	SelectRowsVMatrix (VMat the_source, Vec the_indices)
	Here the indices will be copied locally into an integer vector.
	PLEARN_DECLARE_OBJECT (SelectRowsVMatrix)
virtual void	build ()
	Should call simply inherited::build(), then this class's build_().
virtual void	makeDeepCopyFromShallowCopy (map< const void , void > &copies)
	Transforms a shallow copy into a deep copy.
virtual real	get (int i, int j) const
	returns element (i,j)
virtual void	getSubRow (int i, int j, Vec v) const
	fills v with the subrow i laying between columns j (inclusive) and j+v.length() (exclusive)
virtual real	getStringVal (int col, const string &str) const
	returns value associated with a string (or MISSING_VALUE if there's no association for this string)
virtual string	getValString (int col, real val) const
	returns the string associated with value val for field# col.
virtual string	getString (int row, int col) const
	returns element as a string, even if value doesn't map to a string, in which case tostring(value) is returned
virtual const map< string, real > &	getStringToRealMapping (int col) const
	returns the whole string->value mapping
virtual const map< real, string > &	getRealToStringMapping (int col) const
	returns the value->string mapping for field 'fld'
virtual void	reset_dimensions ()
	in case the dimensions of an underlying vmat has changed, recompute it
virtual real	dot (int i1, int i2, int inputsize) const
virtual real	dot (int i, const Vec &v) const
	returns the result of the dot product between row i and the given vec (only v.length() first elements of row i are considered).
Static Public Member Functions
void	declareOptions (OptionList &ol)
	Declares this class' options.
Public Attributes
TVec< int >	indices
	Public build options.
Protected Member Functions
void	getNewRow (int i, const Vec &v) const
	Must be implemented in subclasses: default version returns an error.
Private Types
typedef SourceVMatrix	inherited
Private Member Functions
void	build_ ()
	This does the actual building.

Detailed Description

selects samples from a source matrix according to given vector of indices

Definition at line 55 of file SelectRowsVMatrix.h.

Member Typedef Documentation

typedef SourceVMatrix PLearn::SelectRowsVMatrix::inherited [private]

Reimplemented from PLearn::SourceVMatrix.
Reimplemented in PLearn::BootstrapVMatrix, PLearn::RemoveDuplicateVMatrix, and PLearn::SortRowsVMatrix.
Definition at line 60 of file SelectRowsVMatrix.h.

Constructor & Destructor Documentation

PLearn::SelectRowsVMatrix::SelectRowsVMatrix ( )

Definition at line 54 of file SelectRowsVMatrix.cc.

PLearn::SelectRowsVMatrix::SelectRowsVMatrix ( VMat the_source,

TVec< int > the_indices

)

Also copies the original fieldinfos upon construction Here the indices will be shared for efficiency.
But you should not modify them afterwards!
Definition at line 58 of file SelectRowsVMatrix.cc.
References build_().

PLearn::SelectRowsVMatrix::SelectRowsVMatrix ( VMat the_source,

Vec the_indices

)

Here the indices will be copied locally into an integer vector.

Definition at line 66 of file SelectRowsVMatrix.cc.
References build_(), indices, PLearn::TVec< T >::length(), PLearn::TVec< int >::resize(), and PLearn::Vec.

Member Function Documentation

void PLearn::SelectRowsVMatrix::build ( ) [virtual]

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::SourceVMatrix.
Reimplemented in PLearn::BootstrapVMatrix, PLearn::RemoveDuplicateVMatrix, and PLearn::SortRowsVMatrix.
Definition at line 117 of file SelectRowsVMatrix.cc.
References build_().

void PLearn::SelectRowsVMatrix::build_ ( ) [private]

This does the actual building.

Reimplemented from PLearn::SourceVMatrix.
Reimplemented in PLearn::BootstrapVMatrix, PLearn::RemoveDuplicateVMatrix, and PLearn::SortRowsVMatrix.
Definition at line 126 of file SelectRowsVMatrix.cc.
References indices, PLearn::TVec< int >::length(), and PLearn::VMat::width().
Referenced by build(), and SelectRowsVMatrix().

void PLearn::SelectRowsVMatrix::declareOptions ( OptionList & ol ) [static]

Declares this class' options.

Reimplemented from PLearn::SourceVMatrix.
Reimplemented in PLearn::BootstrapVMatrix, PLearn::RemoveDuplicateVMatrix, and PLearn::SortRowsVMatrix.
Definition at line 101 of file SelectRowsVMatrix.cc.
References PLearn::declareOption(), and PLearn::OptionList.

real PLearn::SelectRowsVMatrix::dot ( int i,

const Vec & v

) const [virtual]

returns the result of the dot product between row i and the given vec (only v.length() first elements of row i are considered).

Reimplemented from PLearn::RowBufferedVMatrix.
Definition at line 83 of file SelectRowsVMatrix.cc.
References indices.

real PLearn::SelectRowsVMatrix::dot ( int i1,

int i2,

int inputsize

) const [virtual]

returns the dot product between row i1 and row i2 (considering only the inputsize first elements). The default version in VMatrix is somewhat inefficient, as it repeatedly calls get(i,j) The default version in RowBufferedVMatrix is a little better as it buffers the 2 Vecs between calls in case one of them is needed again. But the real strength of this method is for specialised and efficient versions in subbclasses. This method is typically used by SmartKernels so that they can compute kernel values between input samples efficiently.
Reimplemented from PLearn::RowBufferedVMatrix.
Definition at line 80 of file SelectRowsVMatrix.cc.
References indices.

real PLearn::SelectRowsVMatrix::get ( int i,

int j

) const [virtual]

returns element (i,j)

Reimplemented from PLearn::RowBufferedVMatrix.
Definition at line 74 of file SelectRowsVMatrix.cc.
References indices.

void PLearn::SelectRowsVMatrix::getNewRow ( int i,

const Vec & v

) const [inline, protected, virtual]

Must be implemented in subclasses: default version returns an error.

Reimplemented from PLearn::SourceVMatrix.
Definition at line 89 of file SelectRowsVMatrix.h.
References getNewRow(), and getSubRow().
Referenced by getNewRow().

const map< real, string > & PLearn::SelectRowsVMatrix::getRealToStringMapping ( int col ) const [virtual]

returns the value->string mapping for field 'fld'

Reimplemented from PLearn::VMatrix.
Definition at line 98 of file SelectRowsVMatrix.cc.

string PLearn::SelectRowsVMatrix::getString ( int row,

int col

) const [virtual]

returns element as a string, even if value doesn't map to a string, in which case tostring(value) is returned

Reimplemented from PLearn::VMatrix.
Definition at line 92 of file SelectRowsVMatrix.cc.
References indices.

const map< string, real > & PLearn::SelectRowsVMatrix::getStringToRealMapping ( int col ) const [virtual]

returns the whole string->value mapping

Reimplemented from PLearn::VMatrix.
Definition at line 95 of file SelectRowsVMatrix.cc.

real PLearn::SelectRowsVMatrix::getStringVal ( int col,

const string & str

) const [virtual]

returns value associated with a string (or MISSING_VALUE if there's no association for this string)

Reimplemented from PLearn::VMatrix.
Definition at line 86 of file SelectRowsVMatrix.cc.

void PLearn::SelectRowsVMatrix::getSubRow ( int i,

int j,

Vec v

) const [virtual]

fills v with the subrow i laying between columns j (inclusive) and j+v.length() (exclusive)

Reimplemented from PLearn::RowBufferedVMatrix.
Definition at line 77 of file SelectRowsVMatrix.cc.
References PLearn::VMat::getSubRow(), and indices.
Referenced by getNewRow().

string PLearn::SelectRowsVMatrix::getValString ( int col,

real val

) const [virtual]

returns the string associated with value val for field# col.
Or returns "" if no string is associated.
Reimplemented from PLearn::VMatrix.
Definition at line 89 of file SelectRowsVMatrix.cc.
References val.

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

Transforms a shallow copy into a deep copy.

Reimplemented from PLearn::SourceVMatrix.
Reimplemented in PLearn::RemoveDuplicateVMatrix, and PLearn::SortRowsVMatrix.
Definition at line 108 of file SelectRowsVMatrix.cc.
References PLearn::deepCopyField(), and indices.

PLearn::SelectRowsVMatrix::PLEARN_DECLARE_OBJECT ( SelectRowsVMatrix )

virtual void PLearn::SelectRowsVMatrix::reset_dimensions ( ) [inline, virtual]

in case the dimensions of an underlying vmat has changed, recompute it

Reimplemented from PLearn::VMatrix.
Definition at line 102 of file SelectRowsVMatrix.h.
References PLearn::VMat::width().

Member Data Documentation

TVec<int> PLearn::SelectRowsVMatrix::indices

Public build options.

Definition at line 65 of file SelectRowsVMatrix.h.
Referenced by build_(), dot(), get(), getString(), getSubRow(), makeDeepCopyFromShallowCopy(), and SelectRowsVMatrix().

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

Generated on Tue Aug 17 16:26:42 2004 for PLearn by

1.3.7

PLearn::SelectRowsVMatrix Class Reference

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Private Types

Private Member Functions

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation