chickadee » mathh

mathh

Documentation

Provides access to ISO C math functions in <math.h> that are not defined by the Chicken core. Please refer to your documentation for <math.h> for a description of the various calls.

Math Functions

: O ; fixnum. : P2 ; integer. : N, M, N1, N2 ; float.

Usage

(import "mathh")

bessel-j0

bessel-j1

bessel-jn

bessel-jn

bessel-y0

bessel-y1

bessel-yn

bessel-j0 Nprocedure

bessel-j1 Nprocedure

bessel-jn O Nprocedure

bessel-y0 Nprocedure

bessel-y1 Nprocedure

bessel-yn O Nprocedure

cosh

cosh Nprocedure

sinh

sinh Nprocedure

tanh

tanh Nprocedure

acosh

acosh Nprocedure

asinh

asinh Nprocedure

atanh

atanh Nprocedure

hypot

hypot N1 N2procedure

gamma

gamma Nprocedure

lgamma

lgamma Nprocedure

erf

erf Nprocedure

erfc

erfc Nprocedure

log10

log10 Nprocedure

log2

log2 Nprocedure

log1p

log1p Nprocedure

log-with-base

log/base

log-with-base Bprocedure

log/base Bprocedure

Returns a function for the base B logarithm.

ldexp

ldexp N P2procedure

scalbn

scalbn N P2procedure

cbrt

cbrt Nprocedure

nextafter

nextafter N Mprocedure

Returns the next N in the direction of M.

fpmod

fpmod N Mprocedure

Returns the modulus of N for M.

modf

modf*

modf Nprocedure

modf* Nprocedure

Returns two values, the integral and fractional components of N.

frexp

frexp Nprocedure

Returns two values, the fraction and the exponent components of N.

signbit

signbit Nprocedure

Returns #t when negative, #f otherwise.

copysign

copysign N Mprocedure

Returns N with same sign as M.

fpclassify

fpclassify Nprocedure

Returns a symbol denoting the floating-point kind of N.

infinite

nan

normal

subnormal

zero

unclassified

fpclass

fpclass Nprocedure

Returns a symbol denoting the floating-point kind of N.

positive-infinite

negative-infinite

quiet-nan

signaling-nan

positive-normal

negative-normal

positive-subnormal

negative-subnormal

positive-zero

negative-zero

unclassified

Notes

• Some library calls that are not supplied by the platform have rough implementations supplied. See Bugs and Limitations.
• The general naming convention is to use the C library call name as the Scheme name. But there are exceptions:

fmod

fpmod

j0

bessel-j0 (Prefixed to distinguish the names from common variables)

j1

bessel-j1

jn

bessel-jn

y0

bessel-y0

y1

bessel-y1

yn

bessel-yn

Math Constants (Module)

Usage

(import mathh-consts)

Constants

These are all float.

e

e

1/e

1/e

e^2

e^2

e^pi/4

e^(pi/4)

log2e

log2(e)

log10e

log10(e)

ln2

log(2)

ln3

ln(3)

lnpi

ln(pi)

ln10

log(10)

1/ln2

1/ln(2)

1/ln10

1/ln(10)

pi

pi

pi/2

pi/2

pi/4

pi/4

1/pi

1/pi

2/pi

2/pi

2/sqrtpi

2/sqrt(pi)

sqrtpi

sqrt(pi)

pi^2

pi^2

degree

pi/180

sqrt2

sqrt(2)

1/sqrt2

1/sqrt(2)

sqrt3

sqrt(3)

sqrt5

sqrt(5)

sqrt10

sqrt(10)

cubert2

cubert(2)

cubert3

cubert(3)

4thrt2

fourthrt(2)

gamma1/2

gamma(1/2)

gamma1/3

gamma(1/3)

gamma2/3

gamma(2/3)

phi

phi

lnphi

ln(phi)

1/lnphi

1/ln(phi)

euler

euler

e^euler

e^euler

sin1

sin(1)

cos1

cos(1)

zeta3

theta(3)

Math Constants (Include)

Common constants, using 'define-constant'. As such they must be textually included.

Usage

(include "mathh-constants")

Constants

E

e

1/E

1/e

E^2

e^2

E^PI/4

e^(pi/4)

LOG2E

log2(e)

LOG10E

log10(e)

LN2

log(2)

LN3

ln(3)

LNPI

ln(pi)

LN10

log(10)

1/LN2

1/ln(2)

1/LN10

1/ln(10)

PI

pi

PI/2

pi/2

PI/4

pi/4

1/PI

1/pi

2/PI

2/pi

2/SQRTPI

2/sqrt(pi)

SQRTPI

sqrt(pi)

PI^2

pi^2

DEGREE

pi/180

SQRT2

sqrt(2)

1/SQRT2

1/sqrt(2)

SQRT3

sqrt(3)

SQRT5

sqrt(5)

SQRT10

sqrt(10)

CUBERT2

cubert(2)

CUBERT3

cubert(3)

4THRT2

fourthrt(2)

GAMMA1/2

gamma(1/2)

GAMMA1/3

gamma(1/3)

GAMMA2/3

gamma(2/3)

PHI

phi

LNPHI

ln(phi)

1/LNPHI

1/ln(phi)

EULER

euler

E^EULER

e^euler

SIN1

sin(1)

COS1

cos(1)

ZETA3

theta(3)

Requirements

test test-utils

Bugs and Limitations

• The fpclass quiet-nan is only distinguished on Windows.

Author

Kon Lovett John Cowan

Repository

This egg is hosted on the CHICKEN Subversion repository:

https://anonymous@code.call-cc.org/svn/chicken-eggs/release/5/mathh

If you want to check out the source code repository of this egg and you are not familiar with Subversion, see this page.

Version history

4.7.0

Moved misc-math-utils & misc-vector-math-utils to math-utils.

4.6.5

Add coprime? & *coprime?.

4.6.4

Add number->sign. Add test dependency.

4.6.3

Remove vector-apply numeric restriction.

4.6.2

Add vector-mul/div/sum/dif/min/max/lcm/gcd, vector</=/>/<=/>, vector-compare, vector-apply.

4.6.1

Add vector-product & vector-sum. Fix cross-product(3).

4.6.0

Add misc-vector-math-utils.

4.5.1

Fix for include source mathh-constants.scm.

4.5.0

Add log function to misc-math-utils.

4.4.0

Add interest functions to misc-math-utils.

4.3.0

Remove Windows restrictions (C2 era), assume BSD has tgamma.

4.2.3

.

4.2.2

.

4.2.1

.

4.2.0

Add modf*.

4.0.0

CHICKEN 5 release.

License

This code is in the public domain.