math32

Documentation

Overview

Package math32 provides float32 versions of standard library math package routines used by gonum/blas/native.

Index

• func Abs(x float32) float32
• func Copysign(x, y float32) float32
• func Hypot(p, q float32) float32
• func Inf(sign int) float32
• func IsInf(f float32, sign int) bool
• func IsNaN(f float32) (is bool)
• func Max(x, y float32) float32
• func Min(x, y float32) float32
• func NaN() float32
• func Signbit(x float32) bool
• func Sqrt(x float32) float32

Functions

func Abs

func Abs(x float32) float32

Abs returns the absolute value of x.

Special cases are:

Abs(±Inf) = +Inf
Abs(NaN) = NaN

func Copysign

func Copysign(x, y float32) float32

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

func Hypot

func Hypot(p, q float32) float32

Hypot returns Sqrt(p*p + q*q), taking care to avoid unnecessary overflow and underflow.

Special cases are:

Hypot(±Inf, q) = +Inf
Hypot(p, ±Inf) = +Inf
Hypot(NaN, q) = NaN
Hypot(p, NaN) = NaN

func Inf

func Inf(sign int) float32

Inf returns positive infinity if sign >= 0, negative infinity if sign < 0.

func IsInf

func IsInf(f float32, sign int) bool

IsInf reports whether f is an infinity, according to sign. If sign > 0, IsInf reports whether f is positive infinity. If sign < 0, IsInf reports whether f is negative infinity. If sign == 0, IsInf reports whether f is either infinity.

func IsNaN

func IsNaN(f float32) (is bool)

IsNaN reports whether f is an IEEE 754 “not-a-number” value.

func Max

func Max(x, y float32) float32

Max returns the larger of x or y.

Special cases are:

Max(x, +Inf) = Max(+Inf, x) = +Inf
Max(x, NaN) = Max(NaN, x) = NaN
Max(+0, ±0) = Max(±0, +0) = +0
Max(-0, -0) = -0

func Min

func Min(x, y float32) float32

Min returns the smaller of x or y.

Special cases are:

Min(x, -Inf) = Min(-Inf, x) = -Inf
Min(x, NaN) = Min(NaN, x) = NaN
Min(-0, ±0) = Min(±0, -0) = -0

func NaN

func NaN() float32

NaN returns an IEEE 754 “not-a-number” value.

func Signbit

func Signbit(x float32) bool

Signbit returns true if x is negative or negative zero.

func Sqrt

func Sqrt(x float32) float32

Sqrt returns the square root of x.

Special cases are:

Sqrt(+Inf) = +Inf
Sqrt(±0) = ±0
Sqrt(x < 0) = NaN
Sqrt(NaN) = NaN