Package tech.tablesaw.columns.dates

Interface DateMapFunctions

All Superinterfaces:

Column<LocalDate>, Comparator<LocalDate>, Iterable<LocalDate>

All Known Implementing Classes:

DateColumn

public interface DateMapFunctions
extends Column<LocalDate>

An interface for mapping operations unique to Date columns

Method Summary

Modifier and Type	Method	Description
default DateTimeColumn	atStartOfDay()
default DateTimeColumn	atTime(LocalTime time)	Returns a DateTime column where each value consists of the dates from this column combined with the corresponding times from the other column
default DateTimeColumn	atTime(TimeColumn timeColumn)	Returns a DateTime column where each value consists of the dates from this column combined with the corresponding times from the other column
static String	dateColumnName(Column<LocalDate> column1, int value, TemporalUnit unit)
default IntColumn	dayOfMonth()
default StringColumn	dayOfWeek()
default IntColumn	dayOfWeekValue()
default IntColumn	dayOfYear()
default IntColumn	daysUntil(DateColumn column2)
LocalDate	get(int index)	Returns the value at the given zero-based index
int	getIntInternal(int r)
LocalDate	max()
LocalDate	min()
default DateColumn	minus(int value, ChronoUnit unit)
default DateColumn	minusDays(int days)
default DateColumn	minusMonths(int months)
default DateColumn	minusWeeks(int weeks)
default DateColumn	minusYears(int years)
default StringColumn	month()
default IntColumn	monthsUntil(DateColumn column2)
default IntColumn	monthValue()
default DateColumn	plus(int value, ChronoUnit unit)
default DateColumn	plusDays(int days)
default DateColumn	plusMonths(int months)
default DateColumn	plusWeeks(int weeks)
default DateColumn	plusYears(int years)
default IntColumn	timeUntil(DateColumn end, ChronoUnit unit)	Calculates the temporal difference between each element of the receiver and the respective element of the argument
default IntColumn	timeWindow(ChronoUnit unit, int n)
default IntColumn	timeWindow(ChronoUnit unit, int n, LocalDate start)	Returns a column containing integers representing the nth group (0-based) that a date falls into.
default IntColumn	weeksUntil(DateColumn column2)
default IntColumn	year()
default StringColumn	yearDay()	Returns a StringColumn with the year and day-of-year derived from this column concatenated into a String that will sort lexicographically in temporal order.
default StringColumn	yearMonth()	Returns a StringColumn with the year and month from this column concatenated into a String that will sort lexicographically in temporal order.
default StringColumn	yearQuarter()	Returns a StringColumn with the year and quarter from this column concatenated into a String that will sort lexicographically in temporal order.
default IntColumn	yearsUntil(DateColumn column2)
default StringColumn	yearWeek()	Returns a StringColumn with the year and week-of-year derived from this column concatenated into a String that will sort lexicographically in temporal order.

Methods inherited from interface tech.tablesaw.columns.Column

allMatch, anyMatch, append, append, append, appendCell, appendCell, appendMissing, appendObj, asBytes, asList, asObjectArray, asSet, asStringColumn, byteSize, clear, columnWidth, contains, copy, count, count, countMissing, countUnique, emptyCopy, emptyCopy, equals, filter, first, getString, getUnformattedString, indexOf, inRange, interpolate, isEmpty, isMissing, isMissing, isNotMissing, lag, last, lead, map, map, mapInto, max, max, min, min, name, noneMatch, parser, print, reduce, reduce, removeMissing, rolling, rowComparator, sampleN, sampleX, set, set, set, set, set, set, setMissing, setMissingTo, setName, setParser, size, sortAscending, sortDescending, sorted, subset, summary, title, type, unique, valueHash, where

Methods inherited from interface java.util.Comparator

compare, equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Method Details

dateColumnName

static String dateColumnName(Column<LocalDate> column1,
 int value,
 TemporalUnit unit)

daysUntil

default IntColumn daysUntil(DateColumn column2)

weeksUntil

default IntColumn weeksUntil(DateColumn column2)

monthsUntil

default IntColumn monthsUntil(DateColumn column2)

yearsUntil

default IntColumn yearsUntil(DateColumn column2)

dayOfMonth

default IntColumn dayOfMonth()

dayOfYear

default IntColumn dayOfYear()

monthValue

default IntColumn monthValue()

month

default StringColumn month()

year

default IntColumn year()

yearQuarter

default StringColumn yearQuarter()

Returns a StringColumn with the year and quarter from this column concatenated into a String that will sort lexicographically in temporal order.

This simplifies the production of plots and tables that aggregate values into standard temporal units (e.g., you want monthly data but your source data is more than a year long and you don't want months from different years aggregated together).

yearMonth

default StringColumn yearMonth()

Returns a StringColumn with the year and month from this column concatenated into a String that will sort lexicographically in temporal order.

This simplifies the production of plots and tables that aggregate values into standard temporal units (e.g., you want monthly data but your source data is more than a year long and you don't want months from different years aggregated together).

yearDay

default StringColumn yearDay()

Returns a StringColumn with the year and day-of-year derived from this column concatenated into a String that will sort lexicographically in temporal order.

This simplifies the production of plots and tables that aggregate values into standard temporal units (e.g., you want monthly data but your source data is more than a year long and you don't want months from different years aggregated together).

yearWeek

default StringColumn yearWeek()

Returns a StringColumn with the year and week-of-year derived from this column concatenated into a String that will sort lexicographically in temporal order.

This simplifies the production of plots and tables that aggregate values into standard temporal units (e.g., you want monthly data but your source data is more than a year long and you don't want months from different years aggregated together).

dayOfWeekValue

default IntColumn dayOfWeekValue()

dayOfWeek

default StringColumn dayOfWeek()

timeUntil

default IntColumn timeUntil(DateColumn end,
 ChronoUnit unit)

Calculates the temporal difference between each element of the receiver and the respective element of the argument

Missing values in either result in a Missing Value for the new column

plusDays

default DateColumn plusDays(int days)

plusWeeks

default DateColumn plusWeeks(int weeks)

plusYears

default DateColumn plusYears(int years)

plusMonths

default DateColumn plusMonths(int months)

minusDays

default DateColumn minusDays(int days)

minusWeeks

default DateColumn minusWeeks(int weeks)

minusYears

default DateColumn minusYears(int years)

minusMonths

default DateColumn minusMonths(int months)

timeWindow

default IntColumn timeWindow(ChronoUnit unit,
 int n,
 LocalDate start)

Returns a column containing integers representing the nth group (0-based) that a date falls into.

Example: When Unit = ChronoUnit.DAY and n = 5, we form 5 day groups. a Date that is 2 days after the start is assigned to the first ("0") group. A day 7 days after the start is assigned to the second ("1") group.

Parameters:

unit - A ChronoUnit greater than or equal to a day

n - The number of units in each group.

start - The starting point of the first group; group boundaries are offsets from this point

timeWindow

default IntColumn timeWindow(ChronoUnit unit,
 int n)

plus

default DateColumn plus(int value,
 ChronoUnit unit)

minus

default DateColumn minus(int value,
 ChronoUnit unit)

atStartOfDay

default DateTimeColumn atStartOfDay()

atTime

default DateTimeColumn atTime(LocalTime time)

Returns a DateTime column where each value consists of the dates from this column combined with the corresponding times from the other column

atTime

default DateTimeColumn atTime(TimeColumn timeColumn)

Returns a DateTime column where each value consists of the dates from this column combined with the corresponding times from the other column

getIntInternal

int getIntInternal(int r)

get

LocalDate get(int index)

Description copied from interface: Column

Returns the value at the given zero-based index

Specified by:

get in interface Column<LocalDate>

min

LocalDate min()

max

LocalDate max()