Package tech.tablesaw.columns.strings

Interface DictionaryMap

All Known Implementing Classes:

ByteDictionaryMap, IntDictionaryMap, ShortDictionaryMap

public interface DictionaryMap

Interface implemented by the objects that perform the dictionary encoding of the Strings in StringColumn, as well as the primitive values that represent the individual instances of the String in the column.

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[]
default int[]	asIntArray()
String[]	asObjectArray()
Set<String>	asSet()
void	clear()
Table	countByCategory(String columnName)
int	countMissing()	Returns the count of missing values in this column
int	countOccurrences(String value)
int	countUnique()
int	firstIndexOf(String string)
List<BooleanColumn>	getDummies()
int	getKeyAtIndex(int rowNumber)	Returns the int that represents the string at rowNumber
int	getKeyForIndex(int i)
String	getValueForIndex(int rowIndex)
String	getValueForKey(int key)
Selection	isEqualTo(String string)
boolean	isMissing(int rowNumber)
default Selection	isNotEqualTo(String string)
Iterator<String>	iterator()
int	nextKeyWithoutIncrementing()
DictionaryMap	promoteYourself()
Selection	selectIsIn(String... strings)
Selection	selectIsIn(Collection<String> strings)
void	set(int rowIndex, String stringValue)
int	size()
void	sortAscending()
void	sortDescending()
default int	uniqueValuesAt(int index)	Returns the number of unique values at or before the given index

Method Detail

sortDescending

void sortDescending()

sortAscending

void sortAscending()

getKeyAtIndex

int getKeyAtIndex(int rowNumber)

Returns the int that represents the string at rowNumber

getValueForKey

String getValueForKey(int key)

size

int size()

getValueForIndex

String getValueForIndex(int rowIndex)

countOccurrences

int countOccurrences(String value)

asSet

Set<String> asSet()

uniqueValuesAt

default int uniqueValuesAt(int index)

Returns the number of unique values at or before the given index

asIntArray

default int[] asIntArray()

getKeyForIndex

int getKeyForIndex(int i)

firstIndexOf

int firstIndexOf(String string)

asObjectArray

String[] asObjectArray()

selectIsIn

Selection selectIsIn(String... strings)

selectIsIn

Selection selectIsIn(Collection<String> strings)

append

void append(String value)
     throws NoKeysAvailableException

Throws:

NoKeysAvailableException

set

void set(int rowIndex,
         String stringValue)
  throws NoKeysAvailableException

Throws:

NoKeysAvailableException

clear

void clear()

countUnique

int countUnique()

countByCategory

Table countByCategory(String columnName)

isEqualTo

Selection isEqualTo(String string)

isNotEqualTo

default Selection isNotEqualTo(String string)

getDummies

List<BooleanColumn> getDummies()

asBytes

byte[] asBytes(int rowNumber)

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

countMissing

int countMissing()

Returns the count of missing values in this column

iterator

Iterator<String> iterator()

appendMissing

void appendMissing()

isMissing

boolean isMissing(int rowNumber)

promoteYourself

DictionaryMap promoteYourself()

nextKeyWithoutIncrementing

int nextKeyWithoutIncrementing()