Package tech.tablesaw.columns.strings

Class ShortDictionaryMap

java.lang.Object

tech.tablesaw.columns.strings.ShortDictionaryMap

All Implemented Interfaces:

Iterable<String>, DictionaryMap, StringFilters, StringReduceUtils, FilterSpec<Selection>, StringFilterSpec<Selection>

public class ShortDictionaryMap
extends Object
implements DictionaryMap

A map that supports reversible key value pairs of short-String

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ShortDictionaryMap.ShortDictionaryBuilder

Method Summary

Modifier and Type	Method	Description
void	append(String value)
void	appendMissing()
byte[]	asBytes(int rowNumber)	Returns the contents of the cell at rowNumber as a byte[]
String[]	asObjectArray()
Set<String>	asSet()
boolean	canPromoteToText()
void	clear()
Table	countByCategory(String columnName)
int	countMissing()	Returns the count of missing values in this column
int	countOccurrences(String value)
int	countUnique()
boolean	equals(Object o)
int	firstIndexOf(String value)
List<BooleanColumn>	getDummies()	Returns a list of boolean columns suitable for use as dummy variables in, for example, regression analysis, select a column of categorical data must be encoded as a list of columns, such that each column represents a single category and indicates whether it is present (1) or not present (0)
int	getKeyAtIndex(int rowNumber)	Returns the int that represents the string at rowNumber
it.unimi.dsi.fastutil.shorts.Short2IntMap.FastEntrySet	getKeyCountEntries()
int	getKeyForIndex(int rowIndex)
it.unimi.dsi.fastutil.objects.ObjectSet<it.unimi.dsi.fastutil.shorts.Short2ObjectMap.Entry<String>>	getKeyValueEntries()
String	getValueForIndex(int rowIndex)
String	getValueForKey(int key)
int	hashCode()
Selection	isEqualTo(String string)
boolean	isMissing(int rowNumber)
Iterator<String>	iterator()
int	nextKeyWithoutIncrementing()
DictionaryMap	promoteYourself()
Selection	selectIsIn(String... strings)
Selection	selectIsIn(Collection<String> strings)
void	set(int rowIndex, String stringValue)
int	size()	Returns the number of elements (a.k.a.
void	sortAscending()
void	sortDescending()
it.unimi.dsi.fastutil.shorts.ShortArrayList	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface tech.tablesaw.columns.strings.DictionaryMap

asIntArray, get, isEmpty, isIn, isIn, isNotEqualTo, isNotIn, isNotIn, uniqueValuesAt

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface tech.tablesaw.columns.strings.StringFilters

containsString, endsWith, equalsIgnoreCase, equalsIgnoreCase, eval, eval, eval, eval, isAlpha, isAlphaNumeric, isEmptyString, isEqualTo, isIn, isLongerThan, isLowerCase, isMissing, isNotEqualTo, isNotIn, isNotMissing, isNumeric, isShorterThan, isUpperCase, lengthEquals, matchesRegex, startsWith, startsWith

Methods inherited from interface tech.tablesaw.columns.strings.StringReduceUtils

appendAll, appendAll

Method Detail

getKeyAtIndex

public int getKeyAtIndex(int rowNumber)

Returns the int that represents the string at rowNumber

Specified by:

getKeyAtIndex in interface DictionaryMap

size

public int size()

Returns the number of elements (a.k.a. rows or cells) in the column

Specified by:

size in interface DictionaryMap

Specified by:

size in interface StringFilters

Specified by:

size in interface StringReduceUtils

Returns:

size as int

getValueForIndex

public String getValueForIndex(int rowIndex)

Specified by:

getValueForIndex in interface DictionaryMap

getKeyValueEntries

public it.unimi.dsi.fastutil.objects.ObjectSet<it.unimi.dsi.fastutil.shorts.Short2ObjectMap.Entry<String>> getKeyValueEntries()

getKeyCountEntries

public it.unimi.dsi.fastutil.shorts.Short2IntMap.FastEntrySet getKeyCountEntries()

values

public it.unimi.dsi.fastutil.shorts.ShortArrayList values()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getKeyForIndex

public int getKeyForIndex(int rowIndex)

Specified by:

getKeyForIndex in interface DictionaryMap

sortAscending

public void sortAscending()

Specified by:

sortAscending in interface DictionaryMap

getValueForKey

public String getValueForKey(int key)

Specified by:

getValueForKey in interface DictionaryMap

sortDescending

public void sortDescending()

Specified by:

sortDescending in interface DictionaryMap

countOccurrences

public int countOccurrences(String value)

Specified by:

countOccurrences in interface DictionaryMap

asSet

public Set<String> asSet()

Specified by:

asSet in interface DictionaryMap

firstIndexOf

public int firstIndexOf(String value)

Specified by:

firstIndexOf in interface DictionaryMap

asObjectArray

public String[] asObjectArray()

Specified by:

asObjectArray in interface DictionaryMap

countUnique

public int countUnique()

Specified by:

countUnique in interface DictionaryMap

selectIsIn

public Selection selectIsIn(String... strings)

Specified by:

selectIsIn in interface DictionaryMap

selectIsIn

public Selection selectIsIn(Collection<String> strings)

Specified by:

selectIsIn in interface DictionaryMap

append

public void append(String value)
            throws NoKeysAvailableException

Specified by:

append in interface DictionaryMap

Throws:

NoKeysAvailableException

set

public void set(int rowIndex,
                String stringValue)
         throws NoKeysAvailableException

Specified by:

set in interface DictionaryMap

Throws:

NoKeysAvailableException

clear

public void clear()

Specified by:

clear in interface DictionaryMap

countByCategory

public Table countByCategory(String columnName)

Specified by:

countByCategory in interface DictionaryMap

isEqualTo

public Selection isEqualTo(String string)

Specified by:

isEqualTo in interface DictionaryMap

Specified by:

isEqualTo in interface StringFilters

Specified by:

isEqualTo in interface StringFilterSpec<Selection>

getDummies

public List<BooleanColumn> getDummies()

Returns a list of boolean columns suitable for use as dummy variables in, for example, regression analysis, select a column of categorical data must be encoded as a list of columns, such that each column represents a single category and indicates whether it is present (1) or not present (0)

Specified by:

getDummies in interface DictionaryMap

Returns:

a list of BooleanColumn

asBytes

public byte[] asBytes(int rowNumber)

Returns the contents of the cell at rowNumber as a byte[]

Specified by:

asBytes in interface DictionaryMap

countMissing

public int countMissing()

Returns the count of missing values in this column

Specified by:

countMissing in interface DictionaryMap

iterator

public Iterator<String> iterator()

Specified by:

iterator in interface DictionaryMap

Specified by:

iterator in interface Iterable<String>

appendMissing

public void appendMissing()

Specified by:

appendMissing in interface DictionaryMap

isMissing

public boolean isMissing(int rowNumber)

Specified by:

isMissing in interface DictionaryMap

promoteYourself

public DictionaryMap promoteYourself()

Specified by:

promoteYourself in interface DictionaryMap

nextKeyWithoutIncrementing

public int nextKeyWithoutIncrementing()

Specified by:

nextKeyWithoutIncrementing in interface DictionaryMap

canPromoteToText

public boolean canPromoteToText()

Specified by:

canPromoteToText in interface DictionaryMap