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 NaN() float32
• 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 NaN

func NaN() float32

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

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