The Math module contains module functions for basic
trigonometric and transcendental functions.
|
class methods
|
|
atan2
|
Math.atan2( y, x )
-> aFloat
|
|
Computes the arc tangent given y and x. Returns -PI..PI.
|
|
cos
|
Math.cos( aNumeric )
-> aFloat
|
|
Computes the cosine of aNumeric (expressed
in radians).
Returns -1..1.
|
|
exp
|
Math.exp( aNumeric )
-> aFloat
|
|
Returns e raised to the power of aNumeric.
|
|
frexp
|
Math.frexp( aNumeric )
-> anArray
|
|
Returns a two-element array ([aFloat, aFixnum]) containing
the normalized fraction and exponent of aNumeric.
|
|
ldexp
|
Math.ldexp( aFloat, anInteger )
-> aFloat
|
|
Returns the value of aFloat *2 anInteger .
|
|
log
|
Math.log( aNumeric )
-> aFloat
|
|
Returns the natural logarithm of aNumeric.
|
|
log10
|
Math.log10( aNumeric )
-> aFloat
|
|
Returns the base 10 logarithm of aNumeric.
|
|
sin
|
Math.sin( aNumeric )
-> aFloat
|
|
Computes the sine of aNumeric (expressed in
radians). Returns -1..1.
|
|
sqrt
|
Math.sqrt( aNumeric )
-> aFloat
|
|
Returns the non-negative square root of aNumeric.
Raises ArgError if aNumeric is less than zero.
|
|
tan
|
Math.tan( aNumeric )
-> aFloat
|
|
Returns the tangent of aNumeric (expressed in radians).
|
Extracted from the book "Programming Ruby -
The Pragmatic Programmer's Guide"
Copyright
©
2001 by Addison Wesley Longman, Inc. This material may
be distributed only subject to the terms and conditions set forth in
the Open Publication License, v1.0 or later (the latest version is
presently available at http://www.opencontent.org/openpub/)).
Distribution of substantively modified versions of this document is
prohibited without the explicit permission of the copyright holder.
Distribution of the work or derivative of the work in any standard
(paper) book form is prohibited unless prior permission is obtained
from the copyright holder.
