org.nd4j.linalg.dataset.api.iterator.fetcher

Interface DataSetFetcher

All Superinterfaces:

Serializable

All Known Implementing Classes:

BaseDataFetcher

public interface DataSetFetcher
extends Serializable

A low level interface for loading datasets in to memory.

This is used by an DataSetIterator to

handle the specifics of loading data in to memory.

Author:

Adam Gibson

Method Summary

Modifier and Type	Method and Description
int	cursor() Direct access to a number represenative of iterating through a dataset
void	fetch(int numExamples) Fetches the next dataset.
boolean	hasMore() Whether the dataset has more to load
int	inputColumns() The length of a feature vector for an individual example
DataSet	next() Returns the next data applyTransformToDestination
void	reset() Returns the fetcher back to the beginning of the dataset
int	totalExamples() The total number of examples
int	totalOutcomes() The number of labels for a dataset

Method Detail

hasMore

boolean hasMore()

Whether the dataset has more to load

Returns:

whether the data applyTransformToDestination has more to load

next

DataSet next()

Returns the next data applyTransformToDestination

Returns:

the next dataset

fetch

void fetch(int numExamples)

Fetches the next dataset. You need to call this to getFromOrigin a new dataset, otherwise next() just returns the last data applyTransformToDestination fetch

Parameters:

numExamples - the number of examples to fetch

totalOutcomes

int totalOutcomes()

The number of labels for a dataset

Returns:

the number of labels for a dataset

inputColumns

int inputColumns()

The length of a feature vector for an individual example

Returns:

the length of a feature vector for an individual example

totalExamples

int totalExamples()

The total number of examples

Returns:

the total number of examples

reset

void reset()

Returns the fetcher back to the beginning of the dataset

cursor

int cursor()

Direct access to a number represenative of iterating through a dataset

Returns:

a cursor similar to an index