smile.data.vector

Interface StringVector

All Superinterfaces:

BaseVector<java.lang.String,java.lang.String,java.util.stream.Stream<java.lang.String>>, java.io.Serializable, Vector<java.lang.String>

public interface StringVector
extends Vector<java.lang.String>

An immutable string vector.

Method Summary

Modifier and Type	Method and Description
BaseVector	factorize(CategoricalMeasure scale) Converts strings to discrete measured values.
StringVector	get(int... index) Returns a new vector with selected entries.
NominalScale	nominal() Returns a nominal scale of measure based on distinct values in the vector.
static StringVector	of(java.lang.String name, java.lang.String... vector) Creates a named string vector.
static StringVector	of(StructField field, java.lang.String... vector) Creates a named string vector.
Vector<java.time.LocalDate>	toDate(java.time.format.DateTimeFormatter format) Returns a vector of LocalDate.
default Vector<java.time.LocalDate>	toDate(java.lang.String pattern) Returns a vector of LocalDate.
Vector<java.time.LocalDateTime>	toDateTime(java.time.format.DateTimeFormatter format) Returns a vector of LocalDateTime.
default Vector<java.time.LocalDateTime>	toDateTime(java.lang.String pattern) Returns a vector of LocalDateTime.
default java.lang.String	toString(int n) Returns the string representation of vector.
Vector<java.time.LocalTime>	toTime(java.time.format.DateTimeFormatter format) Returns a vector of LocalDate.
default Vector<java.time.LocalTime>	toTime(java.lang.String pattern) Returns a vector of LocalTime.

Methods inherited from interface smile.data.vector.Vector

anyNull, distinct, getByte, getDouble, getFloat, getInt, getLong, getShort, isNullAt, of, of, of, toArray, toDate, toDateTime, toTime

Methods inherited from interface smile.data.vector.BaseVector

apply, apply, array, field, get, measure, name, size, stream, toDoubleArray, toDoubleArray, toIntArray, toIntArray, toStringArray, toStringArray, type

Method Detail

get

StringVector get(int... index)

Description copied from interface: BaseVector

Returns a new vector with selected entries.

Specified by:

get in interface BaseVector<java.lang.String,java.lang.String,java.util.stream.Stream<java.lang.String>>

Specified by:

get in interface Vector<java.lang.String>

Parameters:

index - the index of selected entries.

toDate

default Vector<java.time.LocalDate> toDate(java.lang.String pattern)

Returns a vector of LocalDate. This method assumes that this is a string vector and uses the given date format pattern to parse strings.

toDate

Vector<java.time.LocalDate> toDate(java.time.format.DateTimeFormatter format)

Returns a vector of LocalDate. This method assumes that this is a string vector and uses the given date format pattern to parse strings.

toTime

default Vector<java.time.LocalTime> toTime(java.lang.String pattern)

Returns a vector of LocalTime. This method assumes that this is a string vector and uses the given time format pattern to parse strings.

toTime

Vector<java.time.LocalTime> toTime(java.time.format.DateTimeFormatter format)

Returns a vector of LocalDate. This method assumes that this is a string vector and uses the given time format pattern to parse strings.

toDateTime

default Vector<java.time.LocalDateTime> toDateTime(java.lang.String pattern)

Returns a vector of LocalDateTime. This method assumes that this is a string vector and uses the given date time format pattern to parse strings.

toDateTime

Vector<java.time.LocalDateTime> toDateTime(java.time.format.DateTimeFormatter format)

Returns a vector of LocalDateTime. This method assumes that this is a string vector and uses the given date time format pattern to parse strings.

nominal

NominalScale nominal()

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

factorize

BaseVector 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.

toString

default java.lang.String toString(int n)

Returns the string representation of vector.

Specified by:

toString in interface Vector<java.lang.String>

Parameters:

n - Number of elements to show

of

static StringVector of(java.lang.String name,
                       java.lang.String... vector)

Creates a named string vector.

Parameters:

name - the name of vector.

vector - the data of vector.

of

static StringVector of(StructField field,
                       java.lang.String... vector)

Creates a named string vector.

Parameters:

field - the struct field of vector.

vector - the data of vector.