java.lang.Object
- tech.tablesaw.columns.AbstractColumn<C,T>
- - tech.tablesaw.api.NumberColumn<LongColumn,Long>
  - - tech.tablesaw.api.LongColumn

All Implemented Interfaces:

Iterable<Long>, Comparator<Long>, CategoricalColumn<Long>, NumericColumn<Long>, Column<Long>, NumberFilters, NumberMapFunctions, FilterSpec<Selection>, NumberFilterSpec<Selection>
```
public class LongColumn
extends NumberColumn<LongColumn,Long>
implements CategoricalColumn<Long>
```
A column that contains long values

Field Summary

Fields
Modifier and Type Field Description

protected it.unimi.dsi.fastutil.longs.LongArrayList data
- Fields inherited from class tech.tablesaw.api.NumberColumn
  comparator, locale
- Fields inherited from class tech.tablesaw.columns.AbstractColumn
  DEFAULT_ARRAY_SIZE

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`LongColumn`	`append(long i)`
`LongColumn`	`append(Long val)`	Appends value to the bottom of this column and return this column
`LongColumn`	`append(Column<Long> column)`	Appends all the values in the argument to the bottom of this column and return this column
`LongColumn`	`append(Column<Long> column, int row)`	Appends the value at the given row in the given column to the bottom of this column and return this column
`LongColumn`	`appendCell(String value)`	Add one element to the bottom of this column and set its value to the parsed value of the given String.
`LongColumn`	`appendCell(String value, AbstractColumnParser<?> parser)`	Add one element to the bottom of this column and set its value to the parsed value of the given String, as performed by the given parser
`LongColumn`	`appendMissing()`	Appends a missing value appropriate to the column
`LongColumn`	`appendObj(Object obj)`	Appends the given value to the bottom of this column and return this column
`byte[]`	`asBytes(int rowNumber)`	Returns the contents of the cell at rowNumber as a byte[].
`DateTimeColumn`	`asDateTimes(ZoneOffset offset)`	Returns a DateTimeColumn where each value is the LocalDateTime represented by the values in this column
`DoubleColumn`	`asDoubleColumn()`	Returns a new DoubleColumn containing a value for each value in this column
`FloatColumn`	`asFloatColumn()`	Returns a new FloatColumn containing a value for each value in this column
`IntColumn`	`asIntColumn()`	Returns a new IntColumn containing a value for each value in this column
`long[]`	`asLongArray()`
`Long[]`	`asObjectArray()`	Returns an array of objects as appropriate for my type of column
`Set<Long>`	`asSet()`	Returns a Set containing all the unique values in this column
`ShortColumn`	`asShortColumn()`	Returns a new ShortColumn containing a value for each value in this column
`LongColumn`	`bottom(int n)`	Returns the smallest ("bottom") n values in the column TODO(lwhite): Consider whether this should exclude missing
`void`	`clear()`	Removes all elements TODO: Make this return this column
`int`	`compare(Long o1, Long o2)`
`LongColumn`	`copy()`	Returns a deep copy of the receiver
`Table`	`countByCategory()`	Returns a count of the number of elements in each category (i.e., the number of repetitions of each value) TODO: This needs to be well tested, especially for IntColumn
`int`	`countUnique()`	Returns the count of unique values in this column.
`static LongColumn`	`create(String name)`
`static LongColumn`	`create(String name, int initialSize)`
`static LongColumn`	`create(String name, long... arr)`
`static LongColumn`	`create(String name, LongStream stream)`
`LongColumn`	`createCol(String name)`
`LongColumn`	`createCol(String name, int initialSize)`
`boolean`	`equals(int rowNumber1, int rowNumber2)`	Returns true if the value in this column at rowNumber1 is equal to the value at rowNumber2
`Long`	`get(int index)`	Returns the value at the given zero-based index
`double`	`getDouble(int row)`	Returns a double representation of the number at `index`
`long`	`getLong(int row)`	Returns the value at the given index.
`String`	`getString(int row)`	Returns a string representation of the value at the given row.
`String`	`getUnformattedString(int row)`	Returns a String representation of the value at index r, without any formatting applied
`static LongColumn`	`indexColumn(String columnName, int size, int startsWith)`	Returns a new numeric column initialized with the given name and size.
`Selection`	`isIn(long... numbers)`
`boolean`	`isMissing(int rowNumber)`	Returns true if the value at rowNumber is missing
`boolean`	`isMissingValue(long value)`
`Selection`	`isNotIn(long... numbers)`
`Iterator<Long>`	`iterator()`
`LongColumn`	`lag(int n)`	Returns a column of the same type and size as the receiver, containing the receivers values offset by n.
`it.unimi.dsi.fastutil.longs.LongIterator`	`longIterator()`
`LongColumn`	`removeMissing()`	Returns a copy of this column with the missing values removed
`LongColumn`	`set(int i, long val)`
`LongColumn`	`set(int i, Long val)`	Sets the value at index row to the given value and return this column
`Column<Long>`	`set(int row, String stringValue, AbstractColumnParser<?> parser)`	Sets the value at row to the parsed value of the given String using the given parser and returns this column
`LongColumn`	`set(int row, Column<Long> column, int sourceRow)`	Sets the value at row to the value at sourceRow in the given column and return this column
`LongColumn`	`setMissing(int i)`	Sets the value at index i to the missing-value indicator for this column type, and return this column
`int`	`size()`	Returns the number of elements in this column, including missing values
`void`	`sortAscending()`	Sorts my values in ascending order
`void`	`sortDescending()`	Sorts my values in descending order
`LongColumn`	`subset(int[] rows)`	Return a column of the same type containing just those elements whose indexes are included in the given array
`LongColumn`	`top(int n)`	Returns the largest ("top") n values in the column TODO(lwhite): Consider whether this should exclude missing
`LongColumn`	`unique()`	Returns a column of the same type containing only the unique values
`int`	`valueHash(int rowNumber)`	Returns an int suitable as a hash for the value in this column at the given index
`static boolean`	`valueIsMissing(long value)`

Methods inherited from class tech.tablesaw.api.NumberColumn
byteSize, countMissing, emptyCopy, emptyCopy, getPrintFormatter, rowComparator, set, set, setPrintFormatter, setPrintFormatter

Methods inherited from class tech.tablesaw.columns.AbstractColumn
asStringColumn, filter, first, indexOf, inRange, last, lastIndexOf, map, max, min, name, parser, sampleN, sampleX, set, set, setName, setParser, sorted, toString, type

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface tech.tablesaw.columns.Column
allMatch, anyMatch, asList, byteSize, columnWidth, contains, count, count, countMissing, emptyCopy, emptyCopy, filter, first, indexOf, inRange, last, lastIndexOf, map, map, mapInto, max, max, min, min, name, noneMatch, parser, print, reduce, reduce, rowComparator, sampleN, sampleX, set, set, set, setMissingTo, setName, setParser, sorted, title, type

Methods inherited from interface java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Methods inherited from interface java.lang.Iterable
forEach, spliterator

Methods inherited from interface tech.tablesaw.columns.numbers.NumberFilters
isBetweenExclusive, isBetweenInclusive, isCloseTo, isEqualTo, isEqualTo, isGreaterThan, isGreaterThan, isGreaterThanOrEqualTo, isGreaterThanOrEqualTo, isLessThan, isLessThan, isLessThanOrEqualTo, isLessThanOrEqualTo, isNegative, isNonNegative, isNotEqualTo, isNotEqualTo, isPositive, isZero

Methods inherited from interface tech.tablesaw.columns.numbers.NumberMapFunctions
abs, add, add, add, asPercent, asRatio, bin, cube, cubeRoot, cumMax, cumMin, cumProd, cumSum, difference, divide, divide, divide, log10, log1p, logN, multiply, multiply, multiply, name, neg, normalize, pctChange, power, power, reciprocal, remainder, remainder, round, roundInt, sqrt, square, subtract, subtract, subtract

Methods inherited from interface tech.tablesaw.api.NumericColumn
allMatch, anyMatch, asDoubleArray, asLongColumn, asStringColumn, autoCorrelation, autoCorrelation, count, count, eval, eval, geometricMean, interpolate, isEmpty, isIn, isMissing, isNotIn, isNotMissing, kendalls, kurtosis, lead, mapInto, max, max, mean, median, min, min, noneMatch, pctChange, pearsons, percentile, populationVariance, product, quadraticMean, quartile1, quartile3, range, reduce, reduce, rolling, skewness, spearmans, standardDeviation, stats, sum, summarize, summary, sumOfLogs, sumOfSquares, variance, where

- Field Detail
  - data
```
protected final it.unimi.dsi.fastutil.longs.LongArrayList data
```
- Method Detail
  - valueHash
```
public int valueHash(int rowNumber)
```
    Returns an int suitable as a hash for the value in this column at the given index
    
    Specified by:
    
    valueHash in interface Column<Long>
  - equals
```
public boolean equals(int rowNumber1,
                      int rowNumber2)
```
    Returns true if the value in this column at rowNumber1 is equal to the value at rowNumber2
    
    Specified by:
    
    equals in interface Column<Long>
  - create
```
public static LongColumn create(String name)
```
  - create
```
public static LongColumn create(String name,
                                long... arr)
```
  - create
```
public static LongColumn create(String name,
                                int initialSize)
```
  - create
```
public static LongColumn create(String name,
                                LongStream stream)
```
  - createCol
```
public LongColumn createCol(String name,
                            int initialSize)
```
    Specified by:
    
    createCol in class NumberColumn<LongColumn,Long>
  - createCol
```
public LongColumn createCol(String name)
```
    Specified by:
    
    createCol in class NumberColumn<LongColumn,Long>
  - indexColumn
```
public static LongColumn indexColumn(String columnName,
                                     int size,
                                     int startsWith)
```
    Returns a new numeric column initialized with the given name and size. The values in the column are integers beginning at startsWith and continuing through size (exclusive), monotonically increasing by 1 TODO consider a generic fill function including steps or random samples from various distributions
  - getString
```
public String getString(int row)
```
    Returns a string representation of the value at the given row.
    
    Specified by:
    
    getString in interface Column<Long>
    
    Overrides:
    
    getString in class NumberColumn<LongColumn,Long>
    
    Parameters:
    
    row - The index of the row.
    
    Returns:
    
    value as String
  - valueIsMissing
```
public static boolean valueIsMissing(long value)
```
  - size
```
public int size()
```
    Returns the number of elements in this column, including missing values
    
    Specified by:
    
    size in interface Column<Long>
    
    Specified by:
    
    size in interface NumberFilters
    
    Specified by:
    
    size in interface NumberMapFunctions
  - clear
```
public void clear()
```
    Removes all elements TODO: Make this return this column
    
    Specified by:
    
    clear in interface Column<Long>
  - get
```
public Long get(int index)
```
    Returns the value at the given zero-based index
    
    Specified by:
    
    get in interface Column<Long>
  - subset
```
public LongColumn subset(int[] rows)
```
    Return a column of the same type containing just those elements whose indexes are included in the given array
    
    Specified by:
    
    subset in interface Column<Long>
    
    Overrides:
    
    subset in class AbstractColumn<LongColumn,Long>
  - isIn
```
public Selection isIn(long... numbers)
```
  - isNotIn
```
public Selection isNotIn(long... numbers)
```
  - unique
```
public LongColumn unique()
```
    Returns a column of the same type containing only the unique values
    
    Specified by:
    
    unique in interface Column<Long>
    
    Returns:
    
    a Column
  - top
```
public LongColumn top(int n)
```
    Returns the largest ("top") n values in the column TODO(lwhite): Consider whether this should exclude missing
    
    Specified by:
    
    top in class NumberColumn<LongColumn,Long>
    
    Parameters:
    
    n - The maximum number of records to return. The actual number will be smaller if n is greater than the number of observations in the column
    
    Returns:
    
    A list, possibly empty, of the largest observations
  - bottom
```
public LongColumn bottom(int n)
```
    Returns the smallest ("bottom") n values in the column TODO(lwhite): Consider whether this should exclude missing
    
    Specified by:
    
    bottom in class NumberColumn<LongColumn,Long>
    
    Parameters:
    
    n - The maximum number of records to return. The actual number will be smaller if n is greater than the number of observations in the column
    
    Returns:
    
    A list, possibly empty, of the smallest n observations
  - lag
```
public LongColumn lag(int n)
```
    Returns a column of the same type and size as the receiver, containing the receivers values offset by n.
    For example if you lag a column containing 2, 3, 4 by 1, you get a column containing NA, 2, 3
    
    Specified by:
    
    lag in interface Column<Long>
    
    Specified by:
    
    lag in interface NumericColumn<Long>
  - removeMissing
```
public LongColumn removeMissing()
```
    Returns a copy of this column with the missing values removed
    
    Specified by:
    
    removeMissing in interface Column<Long>
  - append
```
public LongColumn append(long i)
```
  - append
```
public LongColumn append(Long val)
```
    Appends value to the bottom of this column and return this column
    
    Specified by:
    
    append in interface Column<Long>
  - copy
```
public LongColumn copy()
```
    Returns a deep copy of the receiver
    
    Specified by:
    
    copy in interface Column<Long>
    
    Specified by:
    
    copy in interface NumericColumn<Long>
    
    Returns:
    
    a Column
  - asLongArray
```
public long[] asLongArray()
```
  - asDateTimes
```
public DateTimeColumn asDateTimes(ZoneOffset offset)
```
    Returns a DateTimeColumn where each value is the LocalDateTime represented by the values in this column
    The values in this column must be longs that represent the time in milliseconds from the epoch as in standard Java date/time calculations
    
    Parameters:
    
    offset - The ZoneOffset to use in the calculation
    
    Returns:
    
    A column of LocalDateTime values
  - iterator
```
public Iterator<Long> iterator()
```
    Specified by:
    
    iterator in interface Iterable<Long>
  - longIterator
```
public it.unimi.dsi.fastutil.longs.LongIterator longIterator()
```
  - asObjectArray
```
public Long[] asObjectArray()
```
    Returns an array of objects as appropriate for my type of column
    
    Specified by:
    
    asObjectArray in interface Column<Long>
  - compare
```
public int compare(Long o1,
                   Long o2)
```
    Specified by:
    
    compare in interface Comparator<Long>
  - set
```
public LongColumn set(int i,
                      Long val)
```
    Sets the value at index row to the given value and return this column
    
    Specified by:
    
    set in interface Column<Long>
  - set
```
public LongColumn set(int i,
                      long val)
```
  - set
```
public Column<Long> set(int row,
                        String stringValue,
                        AbstractColumnParser<?> parser)
```
    Sets the value at row to the parsed value of the given String using the given parser and returns this column
    
    Specified by:
    
    set in interface Column<Long>
  - append
```
public LongColumn append(Column<Long> column)
```
    Appends all the values in the argument to the bottom of this column and return this column
    
    Specified by:
    
    append in interface Column<Long>
  - append
```
public LongColumn append(Column<Long> column,
                         int row)
```
    Appends the value at the given row in the given column to the bottom of this column and return this column
    
    Specified by:
    
    append in interface Column<Long>
  - set
```
public LongColumn set(int row,
                      Column<Long> column,
                      int sourceRow)
```
    Sets the value at row to the value at sourceRow in the given column and return this column
    
    Specified by:
    
    set in interface Column<Long>
  - appendMissing
```
public LongColumn appendMissing()
```
    Appends a missing value appropriate to the column
    
    Specified by:
    
    appendMissing in interface Column<Long>
  - asBytes
```
public byte[] asBytes(int rowNumber)
```
    Returns the contents of the cell at rowNumber as a byte[].
    
    Specified by:
    
    asBytes in interface Column<Long>
    
    Parameters:
    
    rowNumber - index of the row
    
    Returns:
    
    content as byte[]
  - asSet
```
public Set<Long> asSet()
```
    Returns a Set containing all the unique values in this column
    
    Specified by:
    
    asSet in interface Column<Long>
  - countUnique
```
public int countUnique()
```
    Returns the count of unique values in this column.
    
    Specified by:
    
    countUnique in interface Column<Long>
    
    Returns:
    
    unique values as int
  - getLong
```
public long getLong(int row)
```
    Returns the value at the given index. The actual value is returned if the ColumnType is INTEGER. Otherwise the value is rounded as described below.
    Returns the closest int to the argument, with ties rounding to positive infinity.
    Special cases:
    Special cases:
    
    If the argument is NaN, the result is 0.
    If the argument is positive infinity or any value greater than or equal to the value of Integer.MAX_VALUE, an error will be thrown
    Parameters:
    
    row - the index of the value to be rounded to an integer.
    
    Returns:
    
    the value of the argument rounded to the nearest int value.
    
    Throws:
    
    ClassCastException - if the absolute value of the value to be rounded is too large to be cast to an int
  - getDouble
```
public double getDouble(int row)
```
    Returns a double representation of the number at index
    
    Specified by:
    
    getDouble in interface NumberFilters
    
    Specified by:
    
    getDouble in interface NumberMapFunctions
    
    Specified by:
    
    getDouble in interface NumericColumn<Long>
  - isMissingValue
```
public boolean isMissingValue(long value)
```
  - isMissing
```
public boolean isMissing(int rowNumber)
```
    Returns true if the value at rowNumber is missing
    
    Specified by:
    
    isMissing in interface Column<Long>
    
    Specified by:
    
    isMissing in interface NumberMapFunctions
  - setMissing
```
public LongColumn setMissing(int i)
```
    Sets the value at index i to the missing-value indicator for this column type, and return this column
    
    Specified by:
    
    setMissing in interface Column<Long>
  - sortAscending
```
public void sortAscending()
```
    Sorts my values in ascending order
    
    Specified by:
    
    sortAscending in interface Column<Long>
  - sortDescending
```
public void sortDescending()
```
    Sorts my values in descending order
    
    Specified by:
    
    sortDescending in interface Column<Long>
  - appendObj
```
public LongColumn appendObj(Object obj)
```
    Appends the given value to the bottom of this column and return this column
    
    Specified by:
    
    appendObj in interface Column<Long>
  - appendCell
```
public LongColumn appendCell(String value)
```
    Add one element to the bottom of this column and set its value to the parsed value of the given String. Parsing is type-specific
    
    Specified by:
    
    appendCell in interface Column<Long>
  - appendCell
```
public LongColumn appendCell(String value,
                             AbstractColumnParser<?> parser)
```
    Add one element to the bottom of this column and set its value to the parsed value of the given String, as performed by the given parser
    
    Specified by:
    
    appendCell in interface Column<Long>
  - getUnformattedString
```
public String getUnformattedString(int row)
```
    Returns a String representation of the value at index r, without any formatting applied
    
    Specified by:
    
    getUnformattedString in interface Column<Long>
  - countByCategory
```
public Table countByCategory()
```
    Returns a count of the number of elements in each category (i.e., the number of repetitions of each value) TODO: This needs to be well tested, especially for IntColumn
    
    Specified by:
    
    countByCategory in interface CategoricalColumn<Long>
  - asIntColumn
```
public IntColumn asIntColumn()
```
    Returns a new IntColumn containing a value for each value in this column
    A narrowing conversion of a signed integer to an integral type T simply discards all but the n lowest order bits, where n is the number of bits used to represent type T. In addition to a possible loss of information about the magnitude of the numeric value, this may cause the sign of the resulting value to differ from the sign of the input value.
    In other words, if the element being converted is larger (or smaller) than Integer.MAX_VALUE (or Integer.MIN_VALUE) you will not get a conventionally good conversion.
    Despite the fact that overflow, underflow, or other loss of information may occur, a narrowing primitive conversion never results in a run-time exception.
    A missing value in the receiver is converted to a missing value in the result
    
    Specified by:
    
    asIntColumn in interface NumericColumn<Long>
  - asShortColumn
```
public ShortColumn asShortColumn()
```
    Returns a new ShortColumn containing a value for each value in this column
    A narrowing conversion of a signed long to an integral type T simply discards all but the n lowest order bits, where n is the number of bits used to represent type T. In addition to a possible loss of information about the magnitude of the numeric value, this may cause the sign of the resulting value to differ from the sign of the input value.
    In other words, if the element being converted is larger (or smaller) than Short.MAX_VALUE (or Short.MIN_VALUE) you will not get a conventionally good conversion.
    Despite the fact that overflow, underflow, or other loss of information may occur, a narrowing primitive conversion never results in a run-time exception.
    A missing value in the receiver is converted to a missing value in the result
    
    Specified by:
    
    asShortColumn in interface NumericColumn<Long>
  - asFloatColumn
```
public FloatColumn asFloatColumn()
```
    Returns a new FloatColumn containing a value for each value in this column
    A widening primitive conversion from a long to a float does not lose information about the overall magnitude of a numeric value. It may, however, result in loss of precision - that is, the result may lose some of the least significant bits of the value. In this case, the resulting floating-point value will be a correctly rounded version of the integer value, using IEEE 754 round-to-nearest mode.
    Despite the fact that a loss of precision may occur, a widening primitive conversion never results in a run-time exception.
    A missing value in the receiver is converted to a missing value in the result
    
    Specified by:
    
    asFloatColumn in interface NumericColumn<Long>
  - asDoubleColumn
```
public DoubleColumn asDoubleColumn()
```
    Returns a new DoubleColumn containing a value for each value in this column
    A widening primitive conversion from a long to a double does not lose information about the overall magnitude of a numeric value. It may, however, result in loss of precision - that is, the result may lose some of the least significant bits of the value. In this case, the resulting floating-point value will be a correctly rounded version of the integer value, using IEEE 754 round-to-nearest mode.
    Despite the fact that a loss of precision may occur, a widening primitive conversion never results in a run-time exception.
    A missing value in the receiver is converted to a missing value in the result
    
    Specified by:
    
    asDoubleColumn in interface NumericColumn<Long>

Class LongColumn

Field Summary

Fields inherited from class tech.tablesaw.api.NumberColumn

Fields inherited from class tech.tablesaw.columns.AbstractColumn

Method Summary

Methods inherited from class tech.tablesaw.api.NumberColumn

Methods inherited from class tech.tablesaw.columns.AbstractColumn

Methods inherited from class java.lang.Object

Methods inherited from interface tech.tablesaw.columns.Column

Methods inherited from interface java.util.Comparator

Methods inherited from interface java.lang.Iterable

Methods inherited from interface tech.tablesaw.columns.numbers.NumberFilters

Methods inherited from interface tech.tablesaw.columns.numbers.NumberMapFunctions

Methods inherited from interface tech.tablesaw.api.NumericColumn

Field Detail

data

Method Detail

valueHash

equals

create

create

create

create

createCol

createCol

indexColumn

getString

valueIsMissing

size

clear

get

subset

isIn

isNotIn

unique

top

bottom

lag

removeMissing

append

append

copy

asLongArray

asDateTimes

iterator

longIterator

asObjectArray

compare

set

set

set

append

append

set

appendMissing

asBytes

asSet

countUnique

getLong

getDouble

isMissingValue

isMissing

setMissing

sortAscending

sortDescending

appendObj

appendCell

appendCell

getUnformattedString

countByCategory

asIntColumn

asShortColumn

asFloatColumn

asDoubleColumn