org.datavec.api.transform.sequence

Class ConvertToSequence

java.lang.Object

org.datavec.api.transform.sequence.ConvertToSequence

public class ConvertToSequence
extends Object

Convert a set of values to a sequence. Two approaches are supported:
(a) if "singleStepsequenceMode" is true - convert each record independently, to a "sequence" of length 1
(b) otherwise - performa "group and sort" operations. For example, group by one or more columns, and then sort each value within the group by some mechanism. For example, group by customer, sort by time.

Author:

Alex Black

Constructor Summary

Constructors

Constructor and Description
ConvertToSequence(boolean singleStepSequencesMode, String[] keyColumns, SequenceComparator comparator)
ConvertToSequence(Collection<String> keyColumns, SequenceComparator comparator)
ConvertToSequence(String keyColumn, SequenceComparator comparator)

Method Summary

Modifier and Type	Method and Description
void	setInputSchema(Schema schema)
String	toString()
SequenceSchema	transform(Schema schema)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ConvertToSequence

public ConvertToSequence(String keyColumn,
                         SequenceComparator comparator)

Parameters:

keyColumn - The value to use as the key for inferring which examples belong to what sequence

comparator - The comparator to use when deciding the order of each possible time step in the sequence

ConvertToSequence

public ConvertToSequence(Collection<String> keyColumns,
                         SequenceComparator comparator)

Parameters:

keyColumns - The value or values to use as the key (multiple values: compound key) for inferring which examples belong to what sequence

comparator - The comparator to use when deciding the order of each possible time step in the sequence

ConvertToSequence

public ConvertToSequence(boolean singleStepSequencesMode,
                         String[] keyColumns,
                         SequenceComparator comparator)

Parameters:

keyColumns - The value or values to use as the key (multiple values: compound key) for inferring which examples belong to what sequence

comparator - The comparator to use when deciding the order of each possible time step in the sequence

Method Detail

transform

public SequenceSchema transform(Schema schema)

setInputSchema

public void setInputSchema(Schema schema)

toString

public String toString()

Overrides:

toString in class Object