Package org.sellcom.core.math

Class SpecialFunctions

java.lang.Object

org.sellcom.core.math.SpecialFunctions

public class SpecialFunctions
extends java.lang.Object

Particular mathematical functions.

Since:

1.6

Method Summary

Modifier and Type	Method	Description
static int	ceilLd(int x)	Returns the smallest (closest to negative infinity) value that is greater than or equal to the dual (base 2) logarithm of the given number.
static long	ceilLd(long x)	Returns the smallest (closest to negative infinity) value that is greater than or equal to the dual (base 2) logarithm of the given number.
static java.math.BigDecimal	exp(java.math.BigDecimal x, int scale)	Returns the Euler's number e raised to the power of the given number.
static int	floorLd(int x)	Returns the largest (closest to positive infinity) value that is smaller than or equal to the dual (base 2) logarithm of the given number.
static long	floorLd(long x)	Returns the largest (closest to positive infinity) value that is smaller than or equal to the dual (base 2) logarithm of the given number.
static double	ld(double x)	Returns the dual (base 2) logarithm of the given number.
static double	ln(double x)	Returns the natural (base e) logarithm of the given number.
static java.math.BigDecimal	ln(java.math.BigDecimal x, int scale)	Returns the natural (base e) logarithm of the given number.

Methods inherited from class java.lang.Object

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

Method Detail

ceilLd

public static int ceilLd(int x)

Returns the smallest (closest to negative infinity) value that is greater than or equal to the dual (base 2) logarithm of the given number.

Throws:

java.lang.IllegalArgumentException - if x is not positive

Since:

1.6

ceilLd

public static long ceilLd(long x)

Returns the smallest (closest to negative infinity) value that is greater than or equal to the dual (base 2) logarithm of the given number.

Throws:

java.lang.IllegalArgumentException - if x is not positive

Since:

1.6

exp

public static java.math.BigDecimal exp(java.math.BigDecimal x,
                                       int scale)

Returns the Euler's number e raised to the power of the given number.

Throws:

java.lang.ArithmeticException - if x is > Long.MAX_VALUE

java.lang.IllegalArgumentException - if x is null

Since:

1.6

floorLd

public static int floorLd(int x)

Returns the largest (closest to positive infinity) value that is smaller than or equal to the dual (base 2) logarithm of the given number.

Throws:

java.lang.IllegalArgumentException - if x is not positive

Since:

1.6

floorLd

public static long floorLd(long x)

Returns the largest (closest to positive infinity) value that is smaller than or equal to the dual (base 2) logarithm of the given number.

Throws:

java.lang.IllegalArgumentException - if x is not positive

Since:

1.6

ld

public static double ld(double x)

Returns the dual (base 2) logarithm of the given number.

Throws:

java.lang.IllegalArgumentException - if x is not finite

Since:

1.6

ln

public static java.math.BigDecimal ln(java.math.BigDecimal x,
                                      int scale)

Returns the natural (base e) logarithm of the given number.

Throws:

java.lang.ArithmeticException - if x is ≤ 0

java.lang.IllegalArgumentException - if x is null

Since:

1.6

ln

public static double ln(double x)

Returns the natural (base e) logarithm of the given number.

Throws:

java.lang.IllegalArgumentException - if x is not finite

Since:

1.6