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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, P2 are integer.

N, N1, N2, M are real.

Usage

(include "mathh")

bessel-j0

bessel-j1

bessel-jn

bessel-jn

bessel-y0

bessel-y1

bessel-yn

(bessel-j0 N) => real procedure
(bessel-j1 N) => real procedure
(bessel-jn O N) => real procedure
(bessel-y0 N) => real procedure
(bessel-y1 N) => real procedure
(bessel-yn O N) => real procedure

cosh

sinh

tanh

acosh

asinh

atanh

(cosh N) => real procedure
(sinh N) => real procedure
(tanh N) => real procedure
(acosh N) => real procedure
(asinh N) => real procedure
(atanh N) => real procedure

hypot

(hypot N1 N2) => real procedure

gamma

lgamma

(gamma N) => real procedure
(lgamma N) => real procedure

erf

erfc

(erf N) => real procedure
(erfc N) => real procedure

log10

log2

log1p

(log10 N) => real procedure
(log2 N) => real procedure
(log1p N) => real procedure

make-log/base

(make-log/base N) => (provedure (real) real) procedure

Returns a procedure of one argument, the logarithm function for the base N.

ldexp

scalbn

(ldexp N P2) => real procedure
(scalbn N P2) => real procedure

cbrt

(cbrt N) => real procedure

nextafter

(nextafter N M) => real procedure

Returns the next N in the direction of M.

fpmod

(fpmod N M) => real procedure

Returns the modulus of N for M.

modf

(modf N) => (values real integer) procedure

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

frexp

(frexp N) => (values real real) procedure

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

signbit

(signbit N) => boolean procedure

Returns #t when negative, #f otherwise.

copysign

(copysign N M) => real procedure

Returns N with same sign as M.

fpclassify

(fpclassify N) => symbol procedure

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

infinite
nan
normal
subnormal
zero
unclassified

fpclass

(fpclass N) => symbol procedure

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

Math Constants

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

Notes

fmod
fpmod (Should be in Chicken library?)
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

Bugs and Limitations

Usable versions of log2, log1p, erf, erfc, scalbn & signbit are provided anyway.

Usable version of log2 is provided anyway.

Author

Kon Lovett

John Cowan

Version history

2.2.3 ; Fix for ticket #630
2.2.2 ; mathh-constants.scm copied to Chicken Repository. Produces shared+static object files.
2.2.1
Better no-install support.
2.2.0
Added acosh, asinh, atanh, erf & erfc. Includes <sunmath.h> on Sun platform for log2.
2.1.0
Added signbit, copysign, nextafter & cbrt.
2.0.0
Chicken 4 release. fpclass and fpclassify are now part of the mathh extension.

License

This code is in the public domain.

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