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95 scripts tagged as: [//math]

Natural numbers sum
nutural-numbers-sum.r1.0 KB
27 Sep 2014
Sums all the natural numbers up to a given input. Uses the equality: 1 + 2 + 3 +... + n = n*(n+1)/2 to avoid looping.
author: Caridorc
Test if leap year
oneliner-leapyear.rv:1.0.0
681 bytes
20 Jul 2003
'Leapyear? returns 'true for date values that are leapyears. For example: >> leapyear? 1/1/2001 == none >> leapyear? 1/1/2000 == true
author: Andrew Martin
Morse code
oneliner-morse-code.rv:1.0.0
660 bytes
13 Nov 2003
Encodes a sentence into morse code. This version is a bit suboptimal so that the html generator won't destroy it.
author: Johan Roennblom
Fractional length
oneliner-nfrac.rv:1.0.0
610 bytes
27 Sep 2003
nfrac 33 => 0 ; nfrac 456 => 0 ; nfrac 0.2104 => 4 ; nfrac 1256.63 => 2 ; nfrac 1.0 => 0
author: collective contribution on www.codeur.org/forum/forum.php?theme=17
Calculate Pi
oneliner-pi.rv:1.0.0
654 bytes
20 Jul 2003
Approximate PI with John Wallis formula. Precision limited to 15 digits due to REBOL. Just press ESC when fed up ;-) Formula from http:// www.chez.com/algor/math/pi.htm
author: Jean-Nicolas Merville
Prime factors
oneliner-prime-factors.r
 documentation
556 bytes
23 Jun 2008
[no purpose header found]
author: Sunanda
Prime numbers
oneliner-prime-numbers.rv:0.0.1
452 bytes
23 Dec 2012
Give some prime numbers
author: Marco Antoniazzi translated from Wouter van Oortmerssen
Quine -- a program that displays it's own source
oneliner-quine.rv:1.0.0
636 bytes
8 Mar 2009
Creates a self modifying window. (includes the REBOL Header.)
author: Ammon Johnson
Cellular automata
oneliner-rule-110-ca.rv:1.0.0
759 bytes
20 Jul 2003
Shows some steps in the evolution of a Turing complete cellular automaton from a single marked cell. Replace ..1.11. with some other expression, like ..11.. or .1..11 , and what do you have? Rule 90, and rule 30, respectively.
author: Errru
Day of week
oneliner-weekday.rv:1.0.0
563 bytes
20 Jul 2003
Returns the weekday of the date. Use 'Weekday? like: Weekday? 25/Dec/2002 ; == Wednesday
author: Andrew Martin
Equation Dialect Parser
parse-equation.r
 documentation
v:0.9.3
7.1 KB
15 Mar 2011
Converts a mathematical equation into a block of rebol code that can be evaluated.
author: Francois Vanzeveren
Mathematical Expression Dialect Parser
parse-expression.r
 documentation
v:0.9.6
8.3 KB
22 Mar 2011
Converts a mathematical expression into a block of rebol code that can be evaluated.
author: Francois Vanzeveren
Fire and Smoke particles generator.
particle-generator.rv:1.0.1
11.5 KB
17 Sep 2010
A particle engine demo which generates fire and smoke, with a lot of control and some compositing built-in
author: [unknown]
periodic table
periodictable.r
 documentation
v:0.9.4
11.9 KB
15 Aug 2007
Display a periodic table of the elements as REBOL buttons
author: Brian Tiffin
Permute
permute.rv:1.0.0
2.0 KB
13 Mar 2003
Permutes a matrix.
author: Andrew Martin
Prime number checker
prime.r
 documentation
v:0.0.2
3.0 KB
13 Mar 2003
Address the question, could this integer be a prime number? results of false are not prime, results of true are very probably prime and with the /strong refinement, ( I still have to verify this ) true ( should ) guarantee prime. if the argument is outside the domain of the function, none is returned
author: Tom Conlin
Pytagoras' theorem
pytagoras-thorem.r1.7 KB
3 Oct 2014
User friendly interface to apply the Pytagoras' theorem.
author: Caridorc
Quick Plot Dialect
q-plot.rv:0.1.0
41.4 KB
6 Mar 2007
Provide a quick and easy to use dialect for plotting in REBOL
author: Matt Licholai
r3D
r3d2.r
 documentation
v:2.2.6
21.6 KB
17 Oct 2012
3D Library, you can use also images. Look a the end of the file to see how are made 3D model.
author: andrew hoadley
Random.org
random-org.r900 bytes
17 Jun 2008
Get really random numbers (come from atmospheric noise) from http://random.org
author: [unknown]
Random Number Generator
randomr.rv:1.0
4.1 KB
19 Jun 2009
Random Number Generator using continous and discret statistical laws
author: François Jouen. Based on Vincent Levorato's java code
RebCannon
rebcannon.r5.2 KB
16 Dec 2012
icon for rebcannon.r[no purpose header found]
author: Massimiliano Vessi
Rebocalc
rebocalc.rv:1.0.0
2.7 KB
1 Jan 2005
The world's smallest spreadsheet program, but very powerful.
author: Carl Sassenrath
Rectangle Module
rect-lib.rv:0.0.1
6.8 KB
11 Oct 2003
Code from a REBOLForces article (http://www.rebolforces.com/articles/pairs/2/) that provides support for rectangle-related operations. It was also used to explore the concept of function spec templates. You could refactor that concept out though if you want.
author: Gregg Irwin
Roman
roman.rv:1.0.0
2.1 KB
13 Mar 2003
Converts a Roman numeral to Arabic and reverse!
author: Andrew Martin
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