org.datavec.dataframe.columns

Class AbstractColumn<E extends AbstractColumn>

java.lang.Object

org.datavec.dataframe.columns.AbstractColumn<E>

All Implemented Interfaces:

Column

Direct Known Subclasses:

BooleanColumn, CategoryColumn, DateColumn, DateTimeColumn, DoubleColumn, FloatColumn, IntColumn, LongColumn, ShortColumn, TimeColumn

public abstract class AbstractColumn<E extends AbstractColumn>
extends java.lang.Object
implements Column

Partial implementation of the Column interface

Constructor Summary

Constructors

Constructor and Description
AbstractColumn(ColumnMetadata metadata)
AbstractColumn(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
abstract void	addCell(java.lang.String stringvalue)
ColumnMetadata	columnMetadata()
int	columnWidth() Returns the width of the column in characters, for printing
java.lang.String	comment()
E	difference() Returns a new column of the same type as the receiver, such that the values in the new column contain the difference between each cell in the original and it's predecessor.
java.lang.String	id() Returns a unique string that identifies this column
java.lang.String	metadata() Returns a String containing the column's metadata in json format
java.lang.String	name() Returns the column's name
void	setComment(java.lang.String comment)
void	setName(java.lang.String name) Sets the columns name to the given string

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.datavec.dataframe.columns.Column

append, asBytes, byteSize, clear, copy, countMissing, countUnique, emptyCopy, emptyCopy, first, first, getString, isEmpty, isMissing, isNotMissing, last, last, print, rowComparator, size, sortAscending, sortDescending, subset, summary, title, toDoubleArray, type, unique

Constructor Detail

AbstractColumn

public AbstractColumn(java.lang.String name)

AbstractColumn

public AbstractColumn(ColumnMetadata metadata)

Method Detail

name

public java.lang.String name()

Description copied from interface: Column

Returns the column's name

Specified by:

name in interface Column

id

public java.lang.String id()

Description copied from interface: Column

Returns a unique string that identifies this column

Specified by:

id in interface Column

metadata

public java.lang.String metadata()

Description copied from interface: Column

Returns a String containing the column's metadata in json format

Specified by:

metadata in interface Column

setName

public void setName(java.lang.String name)

Sets the columns name to the given string

Specified by:

setName in interface Column

Parameters:

name - The new name MUST be unique for any table containing this column

addCell

public abstract void addCell(java.lang.String stringvalue)

Specified by:

addCell in interface Column

comment

public java.lang.String comment()

Specified by:

comment in interface Column

setComment

public void setComment(java.lang.String comment)

Specified by:

setComment in interface Column

columnMetadata

public ColumnMetadata columnMetadata()

Specified by:

columnMetadata in interface Column

columnWidth

public int columnWidth()

Returns the width of the column in characters, for printing

Specified by:

columnWidth in interface Column

difference

public E difference()

Description copied from interface: Column

Returns a new column of the same type as the receiver, such that the values in the new column contain the difference between each cell in the original and it's predecessor. The Missing Value Indicator is used for the first cell in the new column. (e.g. IntColumn.MISSING_VALUE)

Specified by:

difference in interface Column