gnu.math
Class RealNum

java.lang.Object
  java.lang.Number
      gnu.math.Numeric
          gnu.math.Quantity
              gnu.math.Complex
                  gnu.math.RealNum

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable

Direct Known Subclasses:

DFloNum, RatNum

public abstract class RealNum
extends Complex
implements java.lang.Comparable

See Also:

Serialized Form

Field Summary

Fields inherited from class gnu.math.Numeric

CEILING, FLOOR, ROUND, TRUNCATE

Constructor Summary

RealNum()

Method Summary

Numeric	abs()
abstract Numeric	add(java.lang.Object obj, int k) Return this + k * obj.
static RealNum	add(RealNum x, RealNum y, int k)
java.math.BigDecimal	asBigDecimal()
int	compareTo(java.lang.Object o) Implements the Comparable interface.
abstract Numeric	div(java.lang.Object obj)
static RealNum	divide(RealNum x, RealNum y)
Complex	exp()
RealNum	im() The value of the imaginary component, as a RealNum.
abstract boolean	isNegative()
boolean	isZero()
Complex	log()
RealNum	max(RealNum x)
RealNum	min(RealNum x)
abstract Numeric	mul(java.lang.Object obj)
RealNum	re() The value of the real component, as a RealNum.
RealNum	rneg()
abstract int	sign() Return 1 if >0; 0 if ==0; -1 if <0; -2 if NaN.
Complex	sin()
Complex	sqrt()
static RealNum	times(RealNum x, RealNum y)
RatNum	toExact() Convert to an exact number.
static IntNum	toExactInt(double value) Converts an integral double (such as a toInt result) to an IntNum.
static IntNum	toExactInt(double value, int rounding_mode) Converts real to an exact integer, with specified rounding mode.
IntNum	toExactInt(int rounding_mode) Converts to an exact integer, with specified rounding mode.
static double	toInt(double d, int rounding_mode) Converts a real to an integer, according to a specified rounding mode.
RealNum	toInt(int rounding_mode) Converts a real to an integer, according to a specified rounding mode.
static IntNum	toScaledInt(double f, int k) Convert double to (rounded) integer, after multiplying by 10**k.
IntNum	toScaledInt(int k) Convert this to (rounded) integer, after multiplying by 10**k.
static IntNum	toScaledInt(RatNum r, int k) Convert rational to (rounded) integer, after multiplying by 10**k.
static java.lang.String	toStringDecimal(java.lang.String dstr)
static java.lang.String	toStringScientific(double d)
static java.lang.String	toStringScientific(float d)
static java.lang.String	toStringScientific(java.lang.String dstr) Convert result of Double.toString or Float.toString to scientific notation.
static int	toStringScientific(java.lang.String dstr, java.lang.StringBuffer sbuf)

Methods inherited from class gnu.math.Complex

add, addReversed, angle, compare, compare, divide, divReversed, doubleImagValue, doubleRealValue, doubleValue, equals, equals, imMinusOne, imOne, isExact, longValue, make, make, mulReversed, neg, neg, number, polar, polar, power, times, toString

Methods inherited from class gnu.math.Quantity

add, compare, compareReversed, dimensions, divide, imValue, make, make, make, reValue, times, unit

Methods inherited from class gnu.math.Numeric

add, div_inv, floatValue, geq, grt, intValue, mul_ident, power, sub, toString

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RealNum

public RealNum()

Method Detail

re

public final RealNum re()

Description copied from class: Quantity

The value of the real component, as a RealNum. The unit() is not factored in, so you actually need to multiply by unit() to get the true real component.

Overrides:

re in class Quantity

im

public final RealNum im()

Description copied from class: Quantity

The value of the imaginary component, as a RealNum. The unit() is not factored in, so you actually need to multiply by unit() to get the true imaginary component.

Overrides:

im in class Quantity

isNegative

public abstract boolean isNegative()

sign

public abstract int sign()

Return 1 if >0; 0 if ==0; -1 if <0; -2 if NaN.

max

public RealNum max(RealNum x)

min

public RealNum min(RealNum x)

add

public static RealNum add(RealNum x,
                          RealNum y,
                          int k)

times

public static RealNum times(RealNum x,
                            RealNum y)

divide

public static RealNum divide(RealNum x,
                             RealNum y)

add

public abstract Numeric add(java.lang.Object obj,
                            int k)

Description copied from class: Numeric

Return this + k * obj.

Overrides:

add in class Complex

mul

public abstract Numeric mul(java.lang.Object obj)

Overrides:

mul in class Complex

div

public abstract Numeric div(java.lang.Object obj)

Overrides:

div in class Complex

abs

public Numeric abs()

Overrides:

abs in class Complex

rneg

public final RealNum rneg()

isZero

public boolean isZero()

Overrides:

isZero in class Complex

toExact

public RatNum toExact()

Convert to an exact number. Implements the Scheme inexact->exact (for real numbers).

toInt

public static double toInt(double d,
                           int rounding_mode)

Converts a real to an integer, according to a specified rounding mode. Note an inexact argument gives an inexact result, following Scheme. See also RatNum.toExactInt.

toInt

public RealNum toInt(int rounding_mode)

Converts a real to an integer, according to a specified rounding mode. Note an inexact argument gives an inexact result, following Scheme. See also toExactInt.

toExactInt

public IntNum toExactInt(int rounding_mode)

Converts to an exact integer, with specified rounding mode.

toExactInt

public static IntNum toExactInt(double value,
                                int rounding_mode)

Converts real to an exact integer, with specified rounding mode.

toExactInt

public static IntNum toExactInt(double value)

Converts an integral double (such as a toInt result) to an IntNum.

exp

public Complex exp()

Overrides:

exp in class Complex

log

public Complex log()

Overrides:

log in class Complex

sin

public final Complex sin()

sqrt

public final Complex sqrt()

Overrides:

sqrt in class Complex

toScaledInt

public static IntNum toScaledInt(double f,
                                 int k)

Convert double to (rounded) integer, after multiplying by 10**k.

toScaledInt

public static IntNum toScaledInt(RatNum r,
                                 int k)

Convert rational to (rounded) integer, after multiplying by 10**k.

toScaledInt

public IntNum toScaledInt(int k)

Convert this to (rounded) integer, after multiplying by 10**k.

compareTo

public int compareTo(java.lang.Object o)

Implements the Comparable interface. This ordering isn't fully consistent with equals, since say it returns 0 when comparing 1.5 and 3/2, though they are not equals.

Specified by:

compareTo in interface java.lang.Comparable

asBigDecimal

public java.math.BigDecimal asBigDecimal()

toStringScientific

public static java.lang.String toStringScientific(float d)

toStringScientific

public static java.lang.String toStringScientific(double d)

toStringScientific

public static java.lang.String toStringScientific(java.lang.String dstr)

Convert result of Double.toString or Float.toString to scientific notation. Does not validate the input.

toStringScientific

public static int toStringScientific(java.lang.String dstr,
                                     java.lang.StringBuffer sbuf)

toStringDecimal

public static java.lang.String toStringDecimal(java.lang.String dstr)