fp-utils
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Additional float routines.
float Computations
Usage
(import fp-utils)N N1 ... X1 ... Y1 ... below are float.
P is the precision in decimal digits, an integer.
fpsummation
- fpsummation NUMSprocedure
Returns sum of NUMS via Kahan Summation Formula.
- NUMS
- (list-of float).
fprandom
- fprandom #!optional Nprocedure
Returns float in [0 1).
- N
- fixnum or float limit.
fpmodulo
- fpmodulo N1 N2procedure
fpquotient
- fpquotient N1 N2procedure
fpremainder
- fpremainder N1 N2procedure
fptruncate-with-precision
fpround-with-precision
fpceiling-with-precision
fpfloor-with-precision
fpmax-and-min
- fpmax-and-min N ...procedure
Returns the maximum & minimum values for the floats N ....
fpdistance
- fpdistance X1 Y1 X2 Y2procedure
Pythagorean distance between the points X1 Y1 and X2 Y2.
fpdistance*
- fpdistance* X1 Y1 X2 Y2procedure
Pythagorean distance, inaccurate but useful for relative comparisons.
fp~=
- (fp~= N1 N2 [EPS float-epsilon]) -> floatprocedure
Compare floating-point values N1 and N2 within some float epsilon EPS.
fp~<=
- fp~<= Nprocedure
fp~>=
- fp~>= Nprocedure
float Inlines
Usage
(import fp-inlines)N N1 ... X1 ... Y1 ... below are float.
P is the precision in decimal digits, an integer.
fpzero?
- fpzero? Nprocedure
fppositive?
- fppositive? Nprocedure
Note that -0.0 is not positive; (fl=? -0.0 0.0).
fpnatural?
- fpnatural? Nprocedure
Note that -0.0 is not cardinal; (fl=? -0.0 0.0).
fpnegative?
- fpnegative? Nprocedure
Note that -0.0 is not negative; (fl=? -0.0 0.0).
fpeven?
- fpeven? Nprocedure
fpodd?
- fpodd? Nprocedure
fpclosed-right?
fpclosedr?
- fpclosed-right? L N Hprocedure
- fpclosedr? L N Hprocedure
Returns N in (L .. H].
N, L & H are float low & high limits.
fpclosed?
Returns N in [L .. H].
- fpclosed? L N Hprocedure
N, L & H are float low & high limits.
fpclosed-left?
fpclosedl?
Returns N in [L .. H).
- fpclosed-left? L N Hprocedure
- fpclosedl? L N Hprocedure
N, L & H are float low & high limits.
fpadd1
- fpadd1 Nprocedure
fpsub1
- fpsub1 Nprocedure
fpfraction
- fpfraction Nprocedure
fpsqr
- fpsqr Nprocedure
fpcub
- fpcub Nprocedure
fpavg
- fpavg N1 N2procedure
fp%
- fp% N1 Pprocedure
: P ; (or float fixnum) ; percentage
fplog2
- fplog2 Nprocedure
fplog10
- fplog10 Nprocedure
fpdegree->radian
- fpdegree->radian Nprocedure
fpradian->degree
- fpradian->degree Nprocedure
fpprecision-factor
- (fpprecision-factor P [BASE 10.0]) -> floatprocedure
Returns factor for P decimal digits precision.
: P ; (or float fixnum) ; precision
fpprecision-epsilon
- (fpprecision-epsilon P [BASE 10.0]) -> floatprocedure
Returns inverse factor for P decimal digits precision.
: P ; (or float fixnum) ; precision
Author
Repository
This egg is hosted on the CHICKEN Subversion repository:
https://anonymous@code.call-cc.org/svn/chicken-eggs/release/5/fp-utils
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
- 4.2.1
- .
- 4.2.0
- Added {{}}.
- 4.1.0
- Added {{}}.
- 4.0.0
- C5 port.
License
This code is in the public domain.