dragon.ml.seqmodel.data

Interface DataSequence

All Known Implementing Classes:

BasicDataSequence

public interface DataSequence

Interface of data sequence

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Method Summary

Modifier and Type	Method and Description
DataSequence	copy() Makes a copy of the current data sequence
int	getLabel(int pos) Gets the label of the token in the given position
int	getOriginalLabel(int pos) Gets the original label of the token in the given position.
Dataset	getParent() Gets the dataset object which the current data sequence belongs to
int	getSegmentEnd(int segmentStart) Gets the ending position of the segment beginning at the given position
BasicToken	getToken(int pos) Gets the token in the given position of the sequence
int	length()
void	setLabel(int pos, int label) Sets the label to the token in the given position.
void	setParent(Dataset parent) Sets the dataset object which the current data sequence belongs to
void	setSegment(int segmentStart, int segmentEnd, int label) Marks the bondary of the segment and sets the given label to all tokens of the segment.

Method Detail

getParent

Dataset getParent()

Gets the dataset object which the current data sequence belongs to

Returns:

he dataset object which the current data sequence belongs to

setParent

void setParent(Dataset parent)

Sets the dataset object which the current data sequence belongs to

Parameters:

parent - the parsent dataset

copy

DataSequence copy()

Makes a copy of the current data sequence

Returns:

a copy of the current data sequence

length

int length()

Returns:

the length of the sequence

getLabel

int getLabel(int pos)

Gets the label of the token in the given position

Parameters:

pos - the position in the sequence

Returns:

the label of the token in the given position

getOriginalLabel

int getOriginalLabel(int pos)

Gets the original label of the token in the given position. For high order markov models, the getLabel method returns a label which combines the current label and the lables of previous positions. However, this method still returns the original label of the given position.

Parameters:

pos - the position in the sequence

Returns:

the label of the token in the given position

getToken

BasicToken getToken(int pos)

Gets the token in the given position of the sequence

Parameters:

pos - the position of the token

Returns:

a token object in the given position

setLabel

void setLabel(int pos,
              int label)

Sets the label to the token in the given position. Same as the getLabel method, for high order markov models, the input label is actually a combined label. This method will convert the combined label to original lable (i.e. the label in the first order)

Parameters:

pos - the position of the token

label - the label for the position

getSegmentEnd

int getSegmentEnd(int segmentStart)

Gets the ending position of the segment beginning at the given position

Parameters:

segmentStart - the starting position of the segment

Returns:

the ending position of the segment beginning at the given position

setSegment

void setSegment(int segmentStart,
                int segmentEnd,
                int label)

Marks the bondary of the segment and sets the given label to all tokens of the segment.

Parameters:

segmentStart - the starting position of the segment

segmentEnd - the ending position of the segment

label - the lable for the segment