Package org.apache.sysds.api.mlcontext

Enum MatrixFormat

java.lang.Object

java.lang.Enum<MatrixFormat>

org.apache.sysds.api.mlcontext.MatrixFormat

All Implemented Interfaces:

Serializable, Comparable<MatrixFormat>

public enum MatrixFormat
extends Enum<MatrixFormat>

MatrixFormat represents the different matrix formats supported by the MLContext API.

Enum Constant Summary

Enum Constants

Enum Constant	Description
CSV	Comma-separated value format (dense).
DF_DOUBLES	DataFrame of doubles with no row index.
DF_DOUBLES_WITH_INDEX	DataFrame of doubles with a row index.
DF_VECTOR	Vector DataFrame with no row index.
DF_VECTOR_WITH_INDEX	Vector DataFrame with a row index.
IJV	(I J V) format (sparse).

Method Summary

Modifier and Type	Method	Description
boolean	hasIDColumn()	Does the DataFrame have a row index?
boolean	isVectorBased()	Is the matrix format vector-based?
static MatrixFormat	valueOf(String name)	Returns the enum constant of this type with the specified name.
static MatrixFormat[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

CSV

public static final MatrixFormat CSV

Comma-separated value format (dense).

IJV

public static final MatrixFormat IJV

(I J V) format (sparse). I and J represent matrix coordinates and V represents the value. The I J and V values are space-separated.

DF_DOUBLES_WITH_INDEX

public static final MatrixFormat DF_DOUBLES_WITH_INDEX

DataFrame of doubles with a row index.

DF_DOUBLES

public static final MatrixFormat DF_DOUBLES

DataFrame of doubles with no row index.

DF_VECTOR_WITH_INDEX

public static final MatrixFormat DF_VECTOR_WITH_INDEX

Vector DataFrame with a row index.

DF_VECTOR

public static final MatrixFormat DF_VECTOR

Vector DataFrame with no row index.

Method Detail

values

public static MatrixFormat[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (MatrixFormat c : MatrixFormat.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static MatrixFormat valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

isVectorBased

public boolean isVectorBased()

Is the matrix format vector-based?

Returns:

true if matrix is a vector-based DataFrame, false otherwise.

hasIDColumn

public boolean hasIDColumn()

Does the DataFrame have a row index?

Returns:

true if the DataFrame has a row index, false otherwise.