math

package

v0.0.0-...-0b81c02 Latest Latest Go to latest Published: Jun 14, 2017 License: BSD-3-Clause Imports: 2 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
Learn more about best practices

Repository

github.com/activestate/go

Links

Open Source Insights

Documentation ¶

Rendered for

Overview ¶

Package math provides basic constants and mathematical functions.

This package does not guarantee bit-identical results across architectures.

Index ¶

Constants
func Abs(x float64) float64
func Acos(x float64) float64
func Acosh(x float64) float64
func Asin(x float64) float64
func Asinh(x float64) float64
func Atan(x float64) float64
func Atan2(y, x float64) float64
func Atanh(x float64) float64
func Cbrt(x float64) float64
func Ceil(x float64) float64
func Copysign(x, y float64) float64
func Cos(x float64) float64
func Cosh(x float64) float64
func Dim(x, y float64) float64
func Erf(x float64) float64
func Erfc(x float64) float64
func Exp(x float64) float64
func Exp2(x float64) float64
func Expm1(x float64) float64
func Float32bits(f float32) uint32
func Float32frombits(b uint32) float32
func Float64bits(f float64) uint64
func Float64frombits(b uint64) float64
func Floor(x float64) float64
func Frexp(f float64) (frac float64, exp int)
func Gamma(x float64) float64
func Hypot(p, q float64) float64
func Ilogb(x float64) int
func Inf(sign int) float64
func IsInf(f float64, sign int) bool
func IsNaN(f float64) (is bool)
func J0(x float64) float64
func J1(x float64) float64
func Jn(n int, x float64) float64
func Ldexp(frac float64, exp int) float64
func Lgamma(x float64) (lgamma float64, sign int)
func Log(x float64) float64
func Log1p(x float64) float64
func Log2(x float64) float64
func Log10(x float64) float64
func Logb(x float64) float64
func Max(x, y float64) float64
func Min(x, y float64) float64
func Mod(x, y float64) float64
func Modf(f float64) (int float64, frac float64)
func NaN() float64
func Nextafter(x, y float64) (r float64)
func Nextafter32(x, y float32) (r float32)
func Pow(x, y float64) float64
func Pow10(n int) float64
func Remainder(x, y float64) float64
func Signbit(x float64) bool
func Sin(x float64) float64
func Sincos(x float64) (sin, cos float64)
func Sinh(x float64) float64
func Sqrt(x float64) float64
func Tan(x float64) float64
func Tanh(x float64) float64
func Trunc(x float64) float64
func Y0(x float64) float64
func Y1(x float64) float64
func Yn(n int, x float64) float64

Constants ¶

View Source

const (
	E   = 2.71828182845904523536028747135266249775724709369995957496696763 // http://oeis.org/A001113
	Pi  = 3.14159265358979323846264338327950288419716939937510582097494459 // http://oeis.org/A000796
	Phi = 1.61803398874989484820458683436563811772030917980576286213544862 // http://oeis.org/A001622

	Sqrt2   = 1.41421356237309504880168872420969807856967187537694807317667974 // http://oeis.org/A002193
	SqrtE   = 1.64872127070012814684865078781416357165377610071014801157507931 // http://oeis.org/A019774
	SqrtPi  = 1.77245385090551602729816748334114518279754945612238712821380779 // http://oeis.org/A002161
	SqrtPhi = 1.27201964951406896425242246173749149171560804184009624861664038 // http://oeis.org/A139339

	Ln2    = 0.693147180559945309417232121458176568075500134360255254120680009 // http://oeis.org/A002162
	Log2E  = 1 / Ln2
	Ln10   = 2.30258509299404568401799145468436420760110148862877297603332790 // http://oeis.org/A002392
	Log10E = 1 / Ln10
)

Mathematical constants.

View Source

const (
	MaxFloat32             = 3.40282346638528859811704183484516925440e+38  // 2**127 * (2**24 - 1) / 2**23
	SmallestNonzeroFloat32 = 1.401298464324817070923729583289916131280e-45 // 1 / 2**(127 - 1 + 23)

	MaxFloat64             = 1.797693134862315708145274237317043567981e+308 // 2**1023 * (2**53 - 1) / 2**52
	SmallestNonzeroFloat64 = 4.940656458412465441765687928682213723651e-324 // 1 / 2**(1023 - 1 + 52)
)

Floating-point limit values. Max is the largest finite value representable by the type. SmallestNonzero is the smallest positive, non-zero value representable by the type.

View Source

const (
	MaxInt8   = 1<<7 - 1
	MinInt8   = -1 << 7
	MaxInt16  = 1<<15 - 1
	MinInt16  = -1 << 15
	MaxInt32  = 1<<31 - 1
	MinInt32  = -1 << 31
	MaxInt64  = 1<<63 - 1
	MinInt64  = -1 << 63
	MaxUint8  = 1<<8 - 1
	MaxUint16 = 1<<16 - 1
	MaxUint32 = 1<<32 - 1
	MaxUint64 = 1<<64 - 1
)

Integer limit values.

Variables ¶

This section is empty.

Functions ¶

func Abs ¶

func Abs(x float64) float64

Abs returns the absolute value of x.

Special cases are:

Abs(±Inf) = +Inf
Abs(NaN) = NaN

func Acos ¶

func Acos(x float64) float64

Acos returns the arccosine, in radians, of x.

Special case is:

Acos(x) = NaN if x < -1 or x > 1

func Acosh ¶

func Acosh(x float64) float64

Acosh returns the inverse hyperbolic cosine of x.

Special cases are:

Acosh(+Inf) = +Inf
Acosh(x) = NaN if x < 1
Acosh(NaN) = NaN

func Asin ¶

func Asin(x float64) float64

Asin returns the arcsine, in radians, of x.

Special cases are:

Asin(±0) = ±0
Asin(x) = NaN if x < -1 or x > 1

func Asinh ¶

func Asinh(x float64) float64

Asinh returns the inverse hyperbolic sine of x.

Special cases are:

Asinh(±0) = ±0
Asinh(±Inf) = ±Inf
Asinh(NaN) = NaN

func Atan ¶

func Atan(x float64) float64

Atan returns the arctangent, in radians, of x.

Special cases are:

Atan(±0) = ±0
Atan(±Inf) = ±Pi/2

func Atan2 ¶

func Atan2(y, x float64) float64

Atan2 returns the arc tangent of y/x, using the signs of the two to determine the quadrant of the return value.

Special cases are (in order):

Atan2(y, NaN) = NaN
Atan2(NaN, x) = NaN
Atan2(+0, x>=0) = +0
Atan2(-0, x>=0) = -0
Atan2(+0, x<=-0) = +Pi
Atan2(-0, x<=-0) = -Pi
Atan2(y>0, 0) = +Pi/2
Atan2(y<0, 0) = -Pi/2
Atan2(+Inf, +Inf) = +Pi/4
Atan2(-Inf, +Inf) = -Pi/4
Atan2(+Inf, -Inf) = 3Pi/4
Atan2(-Inf, -Inf) = -3Pi/4
Atan2(y, +Inf) = 0
Atan2(y>0, -Inf) = +Pi
Atan2(y<0, -Inf) = -Pi
Atan2(+Inf, x) = +Pi/2
Atan2(-Inf, x) = -Pi/2

func Atanh ¶

func Atanh(x float64) float64

Atanh returns the inverse hyperbolic tangent of x.

Special cases are:

Atanh(1) = +Inf
Atanh(±0) = ±0
Atanh(-1) = -Inf
Atanh(x) = NaN if x < -1 or x > 1
Atanh(NaN) = NaN

func Cbrt ¶

func Cbrt(x float64) float64

Cbrt returns the cube root of x.

Special cases are:

Cbrt(±0) = ±0
Cbrt(±Inf) = ±Inf
Cbrt(NaN) = NaN

func Ceil ¶

func Ceil(x float64) float64

Ceil returns the least integer value greater than or equal to x.

Special cases are:

Ceil(±0) = ±0
Ceil(±Inf) = ±Inf
Ceil(NaN) = NaN

func Copysign ¶

func Copysign(x, y float64) float64

Copysign returns a value with the magnitude of x and the sign of y.

func Cos ¶

func Cos(x float64) float64

Cos returns the cosine of the radian argument x.

Special cases are:

Cos(±Inf) = NaN
Cos(NaN) = NaN

func Cosh ¶

func Cosh(x float64) float64

Cosh returns the hyperbolic cosine of x.

Special cases are:

Cosh(±0) = 1
Cosh(±Inf) = +Inf
Cosh(NaN) = NaN

func Dim ¶

func Dim(x, y float64) float64

Dim returns the maximum of x-y or 0.

Special cases are:

Dim(+Inf, +Inf) = NaN
Dim(-Inf, -Inf) = NaN
Dim(x, NaN) = Dim(NaN, x) = NaN

func Erf ¶

func Erf(x float64) float64

Erf returns the error function of x.

Special cases are:

Erf(+Inf) = 1
Erf(-Inf) = -1
Erf(NaN) = NaN

func Erfc ¶

func Erfc(x float64) float64

Erfc returns the complementary error function of x.

Special cases are:

Erfc(+Inf) = 0
Erfc(-Inf) = 2
Erfc(NaN) = NaN

func Exp ¶

func Exp(x float64) float64

Exp returns e**x, the base-e exponential of x.

Special cases are:

Exp(+Inf) = +Inf
Exp(NaN) = NaN

Very large values overflow to 0 or +Inf. Very small values underflow to 1.

func Exp2 ¶

func Exp2(x float64) float64

Exp2 returns 2**x, the base-2 exponential of x.

Special cases are the same as Exp.

func Expm1 ¶

func Expm1(x float64) float64

Expm1 returns e**x - 1, the base-e exponential of x minus 1. It is more accurate than Exp(x) - 1 when x is near zero.

Special cases are:

Expm1(+Inf) = +Inf
Expm1(-Inf) = -1
Expm1(NaN) = NaN

Very large values overflow to -1 or +Inf.

func Float32bits ¶

func Float32bits(f float32) uint32

Float32bits returns the IEEE 754 binary representation of f.

func Float32frombits ¶

func Float32frombits(b uint32) float32

Float32frombits returns the floating point number corresponding to the IEEE 754 binary representation b.

func Float64bits ¶

func Float64bits(f float64) uint64

Float64bits returns the IEEE 754 binary representation of f.

func Float64frombits ¶

func Float64frombits(b uint64) float64

Float64frombits returns the floating point number corresponding the IEEE 754 binary representation b.

func Floor ¶

func Floor(x float64) float64

Floor returns the greatest integer value less than or equal to x.

Special cases are:

Floor(±0) = ±0
Floor(±Inf) = ±Inf
Floor(NaN) = NaN

Documentation ¶

Overview ¶

Index ¶

Constants ¶

Variables ¶

Functions ¶

func Abs ¶

func Acos ¶

func Acosh ¶

func Asin ¶

func Asinh ¶

func Atan ¶

func Atan2 ¶

func Atanh ¶

func Cbrt ¶

func Ceil ¶

func Copysign ¶

func Cos ¶

func Cosh ¶

func Dim ¶

func Erf ¶

func Erfc ¶

func Exp ¶

func Exp2 ¶

func Expm1 ¶

func Float32bits ¶

func Float32frombits ¶

func Float64bits ¶

func Float64frombits ¶

func Floor ¶

func Frexp