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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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.