mathh

  1. mathh
  2. Documentation
    1. Math Functions
      1. Usage
      2. bessel-j0
      3. bessel-j1
      4. bessel-jn
      5. bessel-jn
      6. bessel-y0
      7. bessel-y1
      8. bessel-yn
      9. cosh
      10. sinh
      11. tanh
      12. acosh
      13. asinh
      14. atanh
      15. hypot
      16. gamma
      17. lgamma
      18. erf
      19. erfc
      20. log10
      21. log2
      22. log1p
      23. make-log/base
      24. ldexp
      25. scalbn
      26. cbrt
      27. nextafter
      28. fpmod
      29. modf
      30. frexp
      31. signbit
      32. copysign
      33. fpclassify
      34. fpclass
    2. Math Constants
      1. Usage
      2. Constants
  3. Notes
  4. Bugs and Limitations
  5. Author
  6. Version history
  7. License

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

[procedure] (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

cosh

sinh

tanh

acosh

asinh

atanh

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

hypot

[procedure] (hypot N1 N2) => real

gamma

lgamma

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

erf

erfc

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

log10

log2

log1p

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

make-log/base

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

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

ldexp

scalbn

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

cbrt

[procedure] (cbrt N) => real

nextafter

[procedure] (nextafter N M) => real

Returns the next N in the direction of M.

fpmod

[procedure] (fpmod N M) => real

Returns the modulus of N for M.

modf

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

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

frexp

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

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

signbit

[procedure] (signbit N) => boolean

Returns #t when negative, #f otherwise.

copysign

[procedure] (copysign N M) => real

Returns N with same sign as M.

fpclassify

[procedure] (fpclassify N) => symbol

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

infinite
nan
normal
subnormal
zero
unclassified

fpclass

[procedure] (fpclass N) => symbol

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.