Package smile.data.vector

Class ObjectVector<T>

java.lang.Object

smile.data.vector.AbstractVector

smile.data.vector.ObjectVector<T>

Type Parameters:

T - the data type of vector elements.

All Implemented Interfaces:

Serializable, ValueVector

Direct Known Subclasses:

NumberVector, StringVector

public class ObjectVector<T>
extends AbstractVector

A generic vector.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ObjectVector(String name, T[] vector)	Constructor.
ObjectVector(StructField field, T[] vector)	Constructor.

Method Summary

Modifier and Type	Method	Description
List<T>	distinct()	Returns the distinct values.
T	get(int i)	Returns the value at position i, which may be null.
ObjectVector<T>	get(Index index)	Returns a new vector with selected entries.
boolean	getBoolean(int i)	Returns the boolean value at position i.
byte	getByte(int i)	Returns the byte value at position i.
char	getChar(int i)	Returns the character value at position i.
double	getDouble(int i)	Returns the double value at position i.
float	getFloat(int i)	Returns the float value at position i.
int	getInt(int i)	Returns the integer value at position i.
long	getLong(int i)	Returns the long value at position i.
int	getNullCount()	Returns the number of null/missing values in this vector.
short	getShort(int i)	Returns the short value at position i.
boolean	isNullable()	Returns true if the values of vector may be null.
boolean	isNullAt(int i)	Returns true if the value at the given index is null/missing.
static ObjectVector<boolean[]>	of(String name, boolean[]... vector)	Creates a boolean array vector.
static ObjectVector<byte[]>	of(String name, byte[]... vector)	Creates a byte array vector.
static ObjectVector<char[]>	of(String name, char[]... vector)	Creates a char array vector.
static ObjectVector<double[]>	of(String name, double[]... vector)	Creates a double array vector.
static ObjectVector<float[]>	of(String name, float[]... vector)	Creates a float array vector.
static ObjectVector<int[]>	of(String name, int[]... vector)	Creates an integer array vector.
static ObjectVector<long[]>	of(String name, long[]... vector)	Creates a long integer array vector.
static ObjectVector<short[]>	of(String name, short[]... vector)	Creates a short integer array vector.
void	set(int i, Object value)	Sets the value at position i.
int	size()	Returns the number of elements in the vector.
Stream<T>	stream()	Returns a stream consisting of the elements of this vector.
ObjectVector<T>	withName(String name)	Returns the vector with the new name.

Methods inherited from class smile.data.vector.AbstractVector

field, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface smile.data.vector.ValueVector

anyNull, apply, apply, doubleStream, dtype, eq, ge, get, getScale, getString, gt, intStream, isin, isNull, le, longStream, lt, measure, name, ne, slice, slice, toDoubleArray, toIntArray, toLongArray, toStringArray, toStringArray, update

Constructor Details

ObjectVector

public ObjectVector(String name,
 T[] vector)

Constructor.

Parameters:

name - the name of vector.

vector - the elements of vector.

ObjectVector

public ObjectVector(StructField field,
 T[] vector)

Constructor.

Parameters:

field - the struct field of vector.

vector - the elements of vector.

Method Details

of

public static ObjectVector<boolean[]> of(String name,
 boolean[]... vector)

Creates a boolean array vector.

Parameters:

name - the name of vector.

vector - the data of vector.

Returns:

the vector.

of

public static ObjectVector<char[]> of(String name,
 char[]... vector)

Creates a char array vector.

Parameters:

name - the name of vector.

vector - the data of vector.

Returns:

the vector.

of

public static ObjectVector<byte[]> of(String name,
 byte[]... vector)

Creates a byte array vector.

Parameters:

name - the name of vector.

vector - the data of vector.

Returns:

the vector.

of

public static ObjectVector<short[]> of(String name,
 short[]... vector)

Creates a short integer array vector.

Parameters:

name - the name of vector.

vector - the data of vector.

Returns:

the vector.

of

public static ObjectVector<int[]> of(String name,
 int[]... vector)

Creates an integer array vector.

Parameters:

name - the name of vector.

vector - the data of vector.

Returns:

the vector.

of

public static ObjectVector<long[]> of(String name,
 long[]... vector)

Creates a long integer array vector.

Parameters:

name - the name of vector.

vector - the data of vector.

Returns:

the vector.

of

public static ObjectVector<float[]> of(String name,
 float[]... vector)

Creates a float array vector.

Parameters:

name - the name of vector.

vector - the data of vector.

Returns:

the vector.

of

public static ObjectVector<double[]> of(String name,
 double[]... vector)

Creates a double array vector.

Parameters:

name - the name of vector.

vector - the data of vector.

Returns:

the vector.

withName

public ObjectVector<T> withName(String name)

Description copied from interface: ValueVector

Returns the vector with the new name.

Parameters:

name - the new name.

Returns:

the vector with the new name.

stream

public Stream<T> stream()

Description copied from interface: ValueVector

Returns a stream consisting of the elements of this vector.

Returns:

a stream consisting of the elements of this vector.

distinct

public List<T> distinct()

Returns the distinct values.

Returns:

the distinct values.

size

public int size()

Description copied from interface: ValueVector

Returns the number of elements in the vector.

Returns:

the number of elements in the vector.

set

public void set(int i,
 Object value)

Description copied from interface: ValueVector

Sets the value at position i.

Parameters:

i - the index.

value - the new value.

get

public ObjectVector<T> get(Index index)

Description copied from interface: ValueVector

Returns a new vector with selected entries.

Parameters:

index - the index of selected entries.

Returns:

the new vector of selected entries.

get

public T get(int i)

Description copied from interface: ValueVector

Returns the value at position i, which may be null.

Parameters:

i - the index.

Returns:

the value.

getBoolean

public boolean getBoolean(int i)

Description copied from interface: ValueVector

Returns the boolean value at position i.

Parameters:

i - the index.

Returns:

the value.

getChar

public char getChar(int i)

Description copied from interface: ValueVector

Returns the character value at position i.

Parameters:

i - the index.

Returns:

the value.

getByte

public byte getByte(int i)

Description copied from interface: ValueVector

Returns the byte value at position i.

Parameters:

i - the index.

Returns:

the value.

getShort

public short getShort(int i)

Description copied from interface: ValueVector

Returns the short value at position i.

Parameters:

i - the index.

Returns:

the value.

getInt

public int getInt(int i)

Description copied from interface: ValueVector

Returns the integer value at position i.

Parameters:

i - the index.

Returns:

the value.

getLong

public long getLong(int i)

Description copied from interface: ValueVector

Returns the long value at position i.

Parameters:

i - the index.

Returns:

the value.

getFloat

public float getFloat(int i)

Description copied from interface: ValueVector

Returns the float value at position i.

Parameters:

i - the index.

Returns:

the value.

getDouble

public double getDouble(int i)

Description copied from interface: ValueVector

Returns the double value at position i.

Parameters:

i - the index.

Returns:

the value.

isNullable

public boolean isNullable()

Description copied from interface: ValueVector

Returns true if the values of vector may be null.

Returns:

true if the values of vector may be null.

isNullAt

public boolean isNullAt(int i)

Description copied from interface: ValueVector

Returns true if the value at the given index is null/missing.

Parameters:

i - the index.

Returns:

true if the value at the given index is null/missing.

getNullCount

public int getNullCount()

Description copied from interface: ValueVector

Returns the number of null/missing values in this vector.

Returns:

the number of null/missing values in this vector.