Saluton!
Extmath is an attemt to make the Math more complete by providing
additional constants and functions (for convenience all functions
provided by Math are available as Extmath functions, too). Follows
overview:
CONSTANTS
[ C | E | PI ]
METHODS
Powers and roots
[ hypot | pwr | root | sqr | sqrt ]
Exponential and logarithmic functions
[ exp | exp10 | exp2 | frexp | ldexp | log | log10 | log2 ]
Trigonometric functions
[ acos | acot | acsc | asec | asin | atan | atan2 |
cos | cot | csc | sec | sin | tan ]
Hyperbolic functions
[ acosh | acoth | acsch | asech | asinh | atanh |
cosh | coth | csch | sech | sinh | tanh ]
Special functions
[ beta | erf | erfc | gamma | ln_gamma | sinc ]
Absolute value, sign and rounding
[ abs | ceil | floor | round | sign ]
Integer functions
[ delta | epsilon | factorial | gcd | lcm ]
Solver
[ linsolve | sqsolve ]
C is Euler's constant 0.5772...
acsc is arcus cosecans
beta is Beta function
gamma is Gamma function (generalized factorial)
asec is arcus secans
csc is cosecans
sec is secans
acsch is area cosecans hyperbolicus
asech is area secans hyperbolicus
csch is cosecans hyperbolicus
sech is secans hyperbolicus
sinc is sinc function (sin(x)/x)
abs is absolute value
sign is sign
delta is Kronecker symbol
epsilon is Levi-Civita symbol
gcd is greatest common divisor
lcm is least common multiple
pwr is functional x**y
root is functional x**(1/y)
linsolve solves 'ax+b=c'
sqsolve finds real-valued solutions of 'ax^2 + bx + c = d'
presently all functions not in Math are known to work for real
numbers (at all 464 assertions say so). I can't say anything about
complex numbers because there are no test cases for them.
If something doesn't work right please send test cases that fail.
Comments are welcome, please send them to
jupp (at) rubyforge (dot) org.
More on extmath:
Homepage: http://extmath.rubyforge.org/
Download: http://rubyforge.org/projects/extmath/
Gis,
Josef 'Jupp' Schugt
Mayan date: 12.19.10.09.15, 05 Men, 03 Mol