Package smile.data.vector

Class StringVector

java.lang.Object

smile.data.vector.AbstractVector

smile.data.vector.ObjectVector<String>

smile.data.vector.StringVector

All Implemented Interfaces:

Serializable, ValueVector

public class StringVector
extends ObjectVector<String>

A string vector.

See Also:

• Serialized Form

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
DoubleStream	doubleStream()	Returns a DoubleStream consisting of the elements of this vector, converted to double.
ValueVector	factorize(CategoricalMeasure scale)	Converts strings to discrete measured values.
StringVector	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.
short	getShort(int i)	Returns the short value at position i.
IntStream	intStream()	Returns an IntStream consisting of the elements of this vector, converted to integer.
LongStream	longStream()	Returns a LongStream consisting of the elements of this vector, converted to long.
NominalScale	nominal()	Returns a nominal scale of measure based on distinct values in the vector.
StringVector	withName(String name)	Returns the vector with the new name.

Methods inherited from class smile.data.vector.ObjectVector

distinct, get, getNullCount, isNullable, isNullAt, of, of, of, of, of, of, of, of, set, size, stream

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

Constructor Details

StringVector

public StringVector(String name,
 String[] vector)

Constructor.

Parameters:

name - the name of vector.

vector - the elements of vector.

StringVector

public StringVector(StructField field,
 String[] vector)

Constructor.

Parameters:

field - the struct field of vector.

vector - the elements of vector.

Method Details

nominal

public NominalScale nominal()

Returns a nominal scale of measure based on distinct values in the vector.

Returns:

the nominal scale.

factorize

public ValueVector factorize(CategoricalMeasure scale)

Converts strings to discrete measured values. Depending on how many levels in the nominal scale, the type of returned vector may be byte, short or integer. The missing values/nulls will be converted to -1.

Parameters:

scale - the categorical measure.

Returns:

the factorized vector.

get

public StringVector get(Index index)

Description copied from interface: ValueVector

Returns a new vector with selected entries.

Specified by:

get in interface ValueVector

Overrides:

get in class ObjectVector<String>

Parameters:

index - the index of selected entries.

Returns:

the new vector of selected entries.

withName

public StringVector withName(String name)

Description copied from interface: ValueVector

Returns the vector with the new name.

Specified by:

withName in interface ValueVector

Overrides:

withName in class ObjectVector<String>

Parameters:

name - the new name.

Returns:

the vector with the new name.

intStream

public IntStream intStream()

Description copied from interface: ValueVector

Returns an IntStream consisting of the elements of this vector, converted to integer.

Returns:

an IntStream consisting of the elements of this vector.

longStream

public LongStream longStream()

Description copied from interface: ValueVector

Returns a LongStream consisting of the elements of this vector, converted to long.

Returns:

a LongStream consisting of the elements of this vector.

doubleStream

public DoubleStream doubleStream()

Description copied from interface: ValueVector

Returns a DoubleStream consisting of the elements of this vector, converted to double.

Returns:

a DoubleStream consisting of the elements of this vector.

getBoolean

public boolean getBoolean(int i)

Description copied from interface: ValueVector

Returns the boolean value at position i.

Specified by:

getBoolean in interface ValueVector

Overrides:

getBoolean in class ObjectVector<String>

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.

Specified by:

getChar in interface ValueVector

Overrides:

getChar in class ObjectVector<String>

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.

Specified by:

getByte in interface ValueVector

Overrides:

getByte in class ObjectVector<String>

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.

Specified by:

getShort in interface ValueVector

Overrides:

getShort in class ObjectVector<String>

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.

Specified by:

getInt in interface ValueVector

Overrides:

getInt in class ObjectVector<String>

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.

Specified by:

getLong in interface ValueVector

Overrides:

getLong in class ObjectVector<String>

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.

Specified by:

getFloat in interface ValueVector

Overrides:

getFloat in class ObjectVector<String>

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.

Specified by:

getDouble in interface ValueVector

Overrides:

getDouble in class ObjectVector<String>

Parameters:

i - the index.

Returns:

the value.