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, P2 are integer.

N, N1, N2, M are real.

Usage

(use "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

sinh

tanh

acosh

asinh

atanh

cosh Nprocedure
sinh Nprocedure
tanh Nprocedure
acosh Nprocedure
asinh Nprocedure
atanh Nprocedure

hypot

hypot N1 N2procedure

gamma

lgamma

gamma Nprocedure
lgamma Nprocedure

erf

erfc

erf Nprocedure
erfc Nprocedure

log10

log2

log1p

log10 Nprocedure
log2 Nprocedure
log1p Nprocedure

make-log/base

make-log/base Nprocedure

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

ldexp

scalbn

ldexp N P2procedure
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 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

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

Author

Kon Lovett

John Cowan

Version history

3.0.0 ; Removed 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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