Everything lives under the M object. Functions include:
- round: Default number of significant digits is 2.
- factorial: Returns NaN for negative numbers. Thanks to @Kambfhase for passing along @nikic's significant speed-up! Recursion may be elegant but it's slow.
- limit: Provides an approximation. Works in some cases with +/- Infinity. Needs some additional tweaking.
- derivative: Given f and x, will provide an approximation of the derivative of function f at point x. Round the result to get integers for derivatives of common functions, e.g. of f(x) = 3*x.
- normal: Given mean and deviation returns random values from a normal distribution.
- randint: Given a min, and max returns a random integer in the range: min <= result <= max
The demos/ subdirectory contains a few demos that demonstrate the uses of the various functions.
A stand-alone three dimensional vector class is included in
vector.js. It has methods for common operations such as calculating a vector's length or dot product. The code is based upon Glenn Fielder's C implementation.
var v1 = new Vector(1, 2, 3) var v2 = new Vector(3, 2, 1) var v3 = new Vector(-4, 8, -4) v1.multiply(v2).equals(v3) // -> true
As with vectors, there is a four dimensional matrix class included in a file called
matrix.js. Again, it is a adaption of Glenn Fielder's C implementation.
Copyright (c) 2010 Peter Robinett
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