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 is a fixnum.

P2 is an integer.

N, M, N1, N2 are 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 Nprocedure
log/base Nprocedure

Returns a function for the logarithm of base N.

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

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)

Notes

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

Bugs and Limitations

Author

Kon Lovett John Cowan

Version history

4.2.0
Add modf*.
4.0.0
CHICKEN 5 release.
3.4.2
Fix foreign-declare use. Fix fpzero?, fppositive?, fpnegative?, fpcardinal? again.
3.4.1
Remove unneeded dependency.
3.4.0 ; Fix fppositive?, fpnegative?, fpcardinal?, fpeven?, fpodd?.
3.3.3 ; Remove Windows log2, log1p, erf, erfc, scalbn.
3.3.2 ;
3.3.1 ;
3.3.0 ; Add log-with-base. Deprecate make-log/base. Fix fprandom sign preservation.
3.2.4 ; Add fxlog2, fix fxpow2log2.
3.2.3 ; Fix 4THRT2, 1/LNPHI, extend 1/SQRT2.
3.2.2 ; Remove inline generation for mathh.
3.2.1 ; Add types. Fix signbit & fpclass.
3.2.0 ; Fix fpodd?. Add fx-utils.scm. Extend fp-utils.scm.
3.1.0 ; Added module for mathh-constants.scm.
3.0.0 ; Moved copy of mathh-constants.scm to (chicken-home). Ticket #1327
2.2.6 ; better argvector chicken test
2.2.5 ; argvector chicken support
2.2.4 ;
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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