public class Maths
extends java.lang.Object
Modifier and Type | Class and Description |
---|---|
static class |
Maths.Statistics
Just a record to hold public values.
|
Modifier and Type | Field and Description |
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static double |
DEGREES_PER_RADIAN |
static double |
RADIANS_PER_DEGREE |
static double |
SQRT2 |
Modifier and Type | Method and Description |
---|---|
static double |
acosDegs(double cos)
Get arccos in degrees.
|
static double |
angleDifference(double a1degrees,
double a2degrees)
Find the difference (a1 - a2) between 2 angles in degrees, taking into
account periodicity.
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static double |
angleMean(double... anglesInDegrees)
Find the mean of a set of angles, taking into account periodicity.
|
static Maths.Statistics |
angleStatistics(java.util.Collection<java.lang.Double> anglesInDegrees)
Calculate the min, max, mean and stdDev (all in degrees) of a set or list
of angles, taking into account periodicity.
|
static Maths.Statistics |
angleStatistics(double... anglesInDegrees)
Calculate the min, max, mean and stdDev of a set of angles, taking into
account periodicity.
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static double |
asinDegs(double sin)
Get arcsin in degrees.
|
static double |
asinh(double x)
Hyperbolic inverse sine.
|
static double |
atan2Degs(double sin,
double cos)
Get atan2 in degrees.
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static double |
cosDegs(double xDegs)
Get cosine of an angle given in degrees.
|
static double |
erf(double z)
Gauss error function
erf (z) = (2 / sqrt (pi)) * integral (exp (-t * t), t = 0..z)
Fractional error less than 1.2E-7 although subject to catastrophic
cancellation when z is very close to 0.
|
static double |
erf2(double z)
Fractional error less than x.xx * 10 ^ -4.
|
static double |
in360(double xDegs)
Convert angle x (degrees) to lie in range 0..360
|
static double |
median(double[] x)
May alter the order of elements in the array.
|
static int |
median(int[] x)
May alter the order of elements in the array.
|
static double |
phi(double z)
Cumulative normal distribution calculated using erf ().
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static double |
pythagorus(double a,
double b)
Returns sqrt (aa + bb) avoiding under-/over-flow.
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static double |
sinDegs(double xDegs)
Get sine of an angle given in degrees.
|
static double |
tanDegs(double xDegs)
Get tangent of an angle in degrees.
|
static double |
toDegrees(double xRads) |
static double |
toRadians(double xDegs) |
public static final double DEGREES_PER_RADIAN
public static final double RADIANS_PER_DEGREE
public static final double SQRT2
public static double angleMean(double... anglesInDegrees)
public static double angleDifference(double a1degrees, double a2degrees)
public static Maths.Statistics angleStatistics(double... anglesInDegrees)
public static Maths.Statistics angleStatistics(java.util.Collection<java.lang.Double> anglesInDegrees)
public static double in360(double xDegs)
public static double acosDegs(double cos)
public static double asinDegs(double sin)
public static double asinh(double x)
public static double atan2Degs(double sin, double cos)
public static double sinDegs(double xDegs)
public static double cosDegs(double xDegs)
public static double tanDegs(double xDegs)
public static double toDegrees(double xRads)
public static double toRadians(double xDegs)
public static double erf(double z)
public static double erf2(double z)
public static double pythagorus(double a, double b)
public static double phi(double z)
public static int median(int[] x)
public static double median(double[] x)